This is an oldie but a goodie.
If you take hot showers like most people, you probably have a problem of facing a fogged up mirror in the bathroom.
This is easily remedied by any number of things you have lying around the bathroom. Soap (liquid or bar soap, it doesn’t matter), shampoo, conditioner, shaving cream, or toothpaste. I personally prefer using plain ol’ soap because its very easy to wipe off.
How to do it: Just dab a little bit of soap (or whatever you choose to use - see above) on your hand and wipe this over the foggy mirror, or just the area you want to clear. Wipe the excess soap and suds with your fingers in a few smooth motions, and voila, No More Fog!
The fog-free status will last about a week or so, after which you’ll have to repeat the process.
p.s: I read that you can use spittle too, but that’s just… well that’s gross. Its really only something divers do in the outdoors to clear the fog from their goggles. In the bathroom mirror, I really doubt anyone would want to spit at their own reflection, no?