Um, they'll get thrown in the dishwasher every now and then. Usually not that often. I find it also doesn't really remove the slime, so meh. Everyone is excellent about cleaning their bowls, even if I've added water or something canned/raw to their food. And then they get let out of their crates and clean each others bowls. Then the bowls get put on top of their crates. They either stay in the dogs crate (if my DH feeds) or they get put on top of their crates (if I feed, because it drives me crazy to hear the bowl clanking around when someone goes into their crate.