I usually rinse with very hot water until it looks clean. If there is some dried on gunk, I mix up a scoop of oxyclean and swish it around and let it sit for a while. That usually does the trick, but if not I use a soft cloth to get the rest. I don't use brushes on the plastic, because it might scratch. I have one bucket that is a little bit stained, but the rest are still nice and white looking. I don't bother sanitizing them until I go to use them.