Hi, we just moved our acid cabinet to a different floor, emptying it out during transport. I was thinking of taking the opportunity to give it a good cleaning. Any suggestions? It is a blue Flinn scientific cabinet. There is some discoloration on the inside walls and shelves. I am assuming an ammonia based cleaner is a bad idea... I'd really like to get it spotless and maybe do this once a year, but I don't know how to go about it properly.