Keeping mold away from your shower - my favorite lazy hack

Wiring was a pain though... had to fish wires through the attic, and I’m still finding bits of insulation in my hair.

That bit about the attic insulation made me laugh - been there, done that, still itchy. I’m curious, did you notice any difference in your utility bill after swapping to the humidity-sensing fan? I’ve been weighing the pros and cons for my rentals. On one hand, less mold risk is a win, but if the fan’s running every time someone takes a steamy shower, I wonder if it adds up over time. Anyone tracked that?

I’m still finding bits of insulation in my hair.

Right there with you - nothing like that attic itch to haunt you for days. About the fan, I swapped one in at a flip and honestly, didn’t see much of a spike in the bill. The humidity sensor only kicks on when it’s really needed, so it’s not running 24/7. I figure a little extra electricity is cheaper than dealing with moldy drywall down the line, but maybe that’s just me being lazy about preventative maintenance.

I get the logic behind running the fan with a humidity sensor, but I’ve actually had better luck just upping the airflow with a timer switch. The sensors in some models can be finicky - sometimes they don’t kick on soon enough, or they shut off before the moisture’s really gone. I’ve started setting the timer for 30 minutes after a shower, and it’s made a noticeable difference. Not saying the sensor’s bad, just that sometimes the old-school approach is more reliable, especially in rentals where tenants might not notice if it’s not working right.

TIMER SWITCHES VS. HUMIDITY SENSORS - A PRACTICAL TAKE

I’ve actually been weighing the same thing for my place. Those humidity sensors sound great on paper, but I’ve had two friends complain theirs either didn’t trigger fast enough or shut off while the ceiling was still dripping. I ended up going with a cheap mechanical timer switch, and just set it for 20-25 minutes after I’m done. Not fancy, but I can see (and hear) that it’s doing the job.

Honestly, with how pricey some of those “smart” fans are, I’d rather stick with something I know will work every time. I get tempted by the tech, but sometimes the basic stuff just wins out - especially when I’m the one footing the bill if it breaks.

“I ended up going with a cheap mechanical timer switch, and just set it for 20-25 minutes after I’m done. Not fancy, but I can see (and hear) that it’s doing the job.”

Honestly, I’ve seen way too many “smart” sensors fail in client bathrooms. The timer switch is simple, reliable, and you’re not guessing if it’s working. If you want to go a step further, crack the door open after your shower - old-school but effective. Sometimes low-tech is just less hassle.

Honestly, I think you nailed it with the timer switch. I tried one of those fancy humidity-sensing fans once and it just...didn’t get the job done. Ended up back with a basic dial timer, and it’s been smooth sailing since. Cracking the door is underrated too - my grandma swore by that trick and her bathroom never smelled musty. Sometimes simple really is better, especially when you’re not looking to spend a ton.

Totally get where you’re coming from. I tried one of those “smart” fans too and it just seemed to run forever or not at all - never in between. The old-school timer is way less hassle. I also started keeping a squeegee in the shower and just giving the walls a quick swipe after I’m done. Doesn’t cost much, takes like 30 seconds, and I swear it’s made a difference. My partner thought I was being extra, but now even they admit the bathroom feels fresher. Sometimes it’s the little things, you know?

Doesn’t cost much, takes like 30 seconds, and I swear it’s made a difference.

I’m with you - cheap and simple beats “smart” tech that never quite works. I actually started using an old towel to wipe down the door too. Not glamorous, but it’s free and keeps the glass clear. Sometimes the low-tech route just wins out.

I totally get it - sometimes the simplest stuff just works better. I’ve been through a ton of “miracle” sprays and fancy squeegees that end up in the back of a cabinet. What actually made a difference for me was leaving the shower door cracked open after use, just to let air circulate. It’s not pretty, but it helps dry things out fast. Funny how the old-school tricks usually outlast all the gadgets.

I get where you’re coming from - leaving the door open definitely helps with airflow, but I’ve always been a bit wary about that trick, especially in houses with pets or little kids running around. For me, a quick wipe-down with a microfiber cloth after each shower has been more reliable. It takes maybe 30 seconds, but I’ve noticed a lot less buildup over time. Not the laziest option, I guess, but it keeps things looking cleaner and I don’t have to worry about someone bumping into an open door.

Leaving the door open is great in theory, but yeah, with kids or pets, it’s just asking for trouble. I’ve seen more than a few bathroom doors get slammed by a running dog or a toddler on a mission. The microfiber wipe-down is solid - honestly, it’s what I recommend to folks who want to keep things low-maintenance. If you’re feeling extra lazy, I’ve seen some people just use a squeegee and call it a day. Not perfect, but better than nothing. Mold loves moisture, so anything that gets rid of water fast is a win in my book.

I get the appeal of the squeegee - quick swipe and you’re done. But honestly, if you’re managing a rental or just want to avoid long-term headaches, it’s worth thinking about ventilation too. I’ve seen a lot of folks rely on just wiping things down, but if the bathroom fan isn’t up to snuff, moisture still lingers. That’s when mold sneaks in, especially around grout lines and caulking.

One thing I’ve started doing in my properties is swapping out the standard exhaust fans for humidity-sensing models. They kick on automatically and run until the air’s dry enough. Not exactly “lazy,” but it’s set-and-forget, which is about as low-maintenance as it gets. Pair that with a quick squeegee or microfiber wipe, and you’re covering your bases.

Leaving the door open is great in theory, but yeah, with kids or pets, it’s just not practical. I’ve lost count of how many times I’ve had to rehang a door after a dog barreled through. If you can’t leave it open, at least make sure the fan’s doing its job. Mold’s a pain to remediate, so anything that keeps moisture down is worth the effort upfront.

Humidity-sensing fans are a game changer, no doubt. I put one in our main bath last year after realizing the old fan was basically just for show - barely moved any air. I’m with you that squeegees are only half the battle. I used to think a quick wipe-down was enough, but then I noticed that musty smell creeping in around the tub. Turns out, moisture was still hanging around way longer than I thought.

One thing I’d add: if you’re dealing with older bathrooms, check how the fan vents. I found out (the hard way) that one of mine was just dumping air into the attic instead of outside. Not only does that not help with mold in the bathroom, but it sets you up for issues elsewhere. Ended up crawling around with a flashlight and rerouting ductwork - not my favorite Saturday, but it made a difference.

I hear you on the door thing too. Tried leaving ours open once, and the cat decided it was his new favorite nap spot... right on the wet bath mat. Now we just keep the fan on a timer and call it good.

If anyone’s looking for a super low-effort hack, I’ve also had luck with those moisture-absorbing tubs (the DampRid kind). They’re not a replacement for good ventilation, but in a pinch - like in a windowless powder room - they can help keep things from getting too swampy.

Funny how a little extra attention up front saves so much hassle later. Mold’s not something you want to mess with, especially when it gets behind tile or under caulk. Prevention’s way less gross than scraping out black gunk later.

I get the love for humidity-sensing fans, but honestly, I’ve had mixed results. Sometimes they don’t kick on soon enough, especially after a long hot shower. I actually prefer the old-school switch - just flip it on before you hop in and leave it running for a bit after. Less tech to fail, you know?

“if you’re dealing with older bathrooms, check how the fan vents. I found out (the hard way) that one of mine was just dumping air into the attic instead of outside.”

Been there too - found a vent just blowing into the crawlspace once. Not great. But I’ll admit, those DampRid tubs are a decent backup for tiny spaces. Still, nothing beats just cracking a window if you’ve got one... unless you live somewhere freezing half the year, then yeah, not so fun.

Humidity sensors are hit or miss, I’ll give you that, but I’ve actually had better luck with the newer models. The older ones were pretty sluggish, but the last one I installed seems to kick in right as the mirror starts fogging up. Maybe it’s a wiring thing or just a better sensor? Either way, I’ll take not having to remember the switch - my kids never do, and then I’m scrubbing mildew off grout again.

Totally agree on the venting issue. It’s wild how many houses just dump that moist air into the attic or crawlspace. That’s just asking for mold in places you can’t even see. I always tell folks to check where their fan actually goes, especially in older places.

DampRid works okay for closets, but for bathrooms, I’m all about airflow. If you can’t crack a window because it’s freezing (been there, lived in Minnesota), maybe look at a timer switch? At least then you don’t have to rely on memory or tech that might flake out.

Timer switches are a game changer, especially when you’ve got forgetful folks in the house. I swapped ours in after too many “why is the ceiling pink?” moments. Curious if anyone’s tried those low-watt continuous fans? I’ve heard they’re super efficient but not sure how well they actually keep things dry.

I’ve actually been down the rabbit hole with those low-watt continuous fans. Picked one up last year when I redid our main bath, mostly because my partner’s a chronic “forgetter” when it comes to flipping switches. The thing runs almost silently - half the time I forget it’s even on. It definitely keeps the air moving, but I’ll say, if you’ve got a big family or folks who take marathon showers, you might still get a little condensation here and there.

What I like is that it just chips away at the moisture all day, so you don’t get that swampy smell or the dreaded pink mildew creeping back in. I did notice it took a bit longer for the mirror to clear after a shower compared to blasting a regular fan, though. If your bathroom’s on the smaller side, or you’re just trying to keep things fresh in between deep cleans, it’s a solid lazy hack. But for serious steam sessions, I still hit the timer switch for an extra boost.

The thing runs almost silently - half the time I forget it’s even on.

That’s exactly what sold me on those fans, too - quiet enough that you don’t realize they’re working until you notice the air’s just… fresher. One thing I’ve always wondered: did you have to tweak your door gap or add any extra vents to help airflow? I read somewhere that continuous fans are way more effective if there’s a little space under the door, but I haven’t tested it myself. Curious if you noticed a difference with that, or if the fan alone did the trick.

I actually had to shave about a quarter inch off the bottom of my bathroom door after installing the fan. Before that, the airflow felt kind of weak and the humidity lingered longer than I expected. Once I made that gap, it was like night and day - steam clears out way faster now. Didn’t bother with extra vents, just that small door tweak did the job for me. Funny how such a minor detail can make a big difference.

Funny how such a minor detail can make a big difference.

- Had the same issue - fan was rated high CFM but didn’t do much until I checked the door gap.
- Shaving the door was way cheaper than adding a vent, for sure.
- Did you notice any drafts or temp changes in the bathroom after you cut the gap? I’m always worried about losing heat in winter.