Every night, my wife disinfects every surface we touch with alcohol, such as doorknobs, light switches, our phones and TV remotes, etc. Tonight, right before bed, we suddenly found that our bathroom light refused to turn on. My best guess was that some alcohol had gotten into the switch and caused a short circuit. So I took apart the light switch panel to try to identify where the short occurred. Most of the switch was glued to the wall though, so there was only so much I could take apart without ripping the whole thing out of the wall. So I figured I'd leave the panel off overnight, and hopefully the alcohol will have evaporated in the morning and the switch would work again.
Before heading to bed though, I suddenly had a hunch, and changed the bulb. Now the light works.
I feel like a dumbass.