I just tried using ketchup to clean my glasses. it didn't work very well, they're hella messy, but I can still see pretty well through them. turns out heinzsight IS 20/20.
A Horse walks into a bar. The bartender says, "Hey, you're in here a lot, are you an alcoholic?" The horse ponders for a minute then responds "I don't think I am." And poof, he disappears. This is where philosophy students start to snicker, as they're familiar with Descartes' famous postulate, "I think, therefore I am." But telling you that first would be putting Descartes before the horse.