Everyone who wears glasses can relate to this: you go to the bakery to buy some bread and as soon as you go inside, you can’t see a thing. Your lenses completely fog up. When cooking, all sorts of grease spots spray up on your glasses and then you have to clean them again. Dunk them quickly in the dishwashing water?
Or in the worst-case scenario, if you aren’t careful, the lenses get scratched or they break.