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We want to install a permanent mirror in a new shower, but hope to find a permanent way to prevent it from fogging up.

I have seen gooseneck mirrors that hook up to the showerhead itself so as to run hot water behind the mirror, which supposedly prevents fogging, but I'm wondering if there's a way to do a permanent installation. I'm imagining maybe building in a mirror to the wall of the shower and somehow running the hot water pipes behind it. Would that work? Have you ever seen anything like this? Or is there a better way to get a fog-free mirror experience in the shower?

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if you put it in the wall you can heat it with a electric element even. just to keep it 40/50deg celcuis. –  ppumkin Jul 29 '11 at 7:59
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I don't think there are Celsius heating elements in New York. –  Jay Bazuzi Aug 3 '12 at 16:22
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12 Answers

Toothpaste; not one with baking soda though. It works on diving masks too!

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Please explain exactly how you use the toothpaste. –  Niall C. May 12 '13 at 5:24
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I recall hearing this somewhere else, but I agree you need to offer some more details. –  ShoeMaker May 12 '13 at 10:52
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Low voltage plastic mats which can be installed behind mirror. No danger of electrocution. They can also be used under any flooring.

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Please see the faq for the rules on self-promotion on this site. –  Niall C. May 11 '13 at 14:56
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I've learned a little trick to this: Water vapor only condenses on colder surfaces so holding the mirror under the hot shower until it has warmed up will make it no longer fog up.

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Just spit on your mirror and smear it all over it every time before you get out of the shower. I tried all the above a long time ago and did the spit as an experiment and it worked! When you pick up your mirror to use it just give it a rinse under the water and no fog the entire use. Promise.

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I purchased a mirror that has a water reservoir in the back. You fill it with hot water when you start your shower and it will never fog. I've been using it for a few years and I love it.

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Spray some WD-40 on the mirror, then wipe it off.

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I'm not so sure this is a good idea. I've heard of WD-40 having a reaction with the reflective substance on some mirrors. –  ShoeMaker May 11 '13 at 11:49
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It's not a permanent solution, but an easy solution is to get yourself a facial scrub that has glycerin in it. (A lot of them do. Get one that's a gel, not a cream.) Take a little dab of that and rub it on the mirror, and it'll stay fog-free for the duration of your shower. Bonus: Maybe it'll help encourage you to use a proper facial scrub rather than just using regular soap. :)

As someone else said above, though, spit does also work, though of course is a bit grosser.

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I'm unaware of any permanent solutions, but there are quick fixes available in the auto and dental industry. Dentists use anti-fogging solution like this or this.

I know a guy who uses Rain-X Interior Glass Anti-Fog on his car mirrors. Would probably work inside a shower, too.

enter image description here

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I've used Fog-X it on mirrors and sliding glass doors in my hot tub room. Works well, lasts a few months. –  shirlock homes Jul 29 '11 at 23:44
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A good ventilation fan, to remove the steam is the first step. Then you need a heated mirror, or try to putting a floor heating mat behind the mirror. If the mirror is warmer then the tiles then most condensation will form on the tiles rather then mirror.

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For the truly DIY solution, you can clean the mirror with soapy water. The layer of soap helps reduce the fog. It also tends to be the nearest cleaner when you're in the shower.

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Actually, dish detergent is better than bath soap; it doesn't leave a soap scum film. –  KeithS Jul 29 '11 at 20:10
    
Shaving cream is supposed to work too. Might be worth a shot –  electricsauce Aug 1 '11 at 3:26
    
I've also heard spit works well. –  evil otto Aug 5 '11 at 20:04
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Yes, install heating cable behind the mirror - it will heat the mirror and water will not condense on the mirror. Heating cable manufacturers even offer some special kits for that - like this one from DEVI.

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Is it really safe to install electrical appliances in a shower? –  Spike Jul 31 '11 at 22:59
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@Spike: Heating cables for such installations feature multiple layers of insulation and even a surrounding wire mesh that can (and should) be grounded. Add to this "differential" circuit breakers - and risk of electric shock becomes lower than risk of falling and getting a head injury that way. Electric water heaters don't make you worry, do they? –  sharptooth Aug 1 '11 at 5:16
    
@sharpooth: No, that sounds about perfect. The picture on the Devi site had it behind a sink. I didn't know it would be rated for inside showers. Also, just about everything makes me worry. I worry. I'm a worrier. –  Spike Aug 1 '11 at 10:58
    
@sharptooth - We needn't worry about electric water heaters because the drum of the water heater and the plumbing has a good path to ground. You cannot say the same about a mirror in a shower - the human could easily be the best path to ground. I'm not saying that the mirror heaters are dangerous, I'm just saying it's not apples-to-apples wrt electrocution risk. –  alx9r Dec 13 '12 at 6:44
    
@alx9r: You can't be sure about what the plumbing is made of and how exactly it is laid in the ground. It can be made of plastic and therefore ungrounded. What you claim is a common misconception that sometimes causes electrocution. –  sharptooth Dec 13 '12 at 7:14
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enter image description here

http://www.speich.it/htmlEN/PG/PG.htm

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WHooo windscreen wipers in ma Shower! hahahah –  ppumkin Jul 29 '11 at 12:51
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