answer:If you can find a pot big enough to immerse all of it or part of it, fill that pot with water, and dump in a teaspoon or more of automatic dishwasher detergent. bring the pot to a simmer and let it sit there for maybe 30 minutes. Pull out the rack and scrub away at it with an SOS pad, and then if necessary, repeat. I’ve also had similar results with wash off paint remover.