Hi, I love percolator coffee! For a while I have been trying to figure out ways to clean mine (I have 3). On both aluminum and even stainless steel they can and will get stained. Washing in sink doesn't take off stains, plus it leaves a soapy taste in my coffee :mrgreen: . Now I figured out to boil in a solution of vinegar and water 50/50. First you put in vinegar and water, put basket in also, boil on stove on highest temp until it has violent boil, wait for a while, boil again on next lowest temp, repeat until it has been done on 3rd lowest temp, then pour out water, use a scrubby (not a brillo pad, it has soap) like a metal one, rinse. It may not get completely clean on first try, but your coffee will taste better. If stains aren't too bad this does not have to be done on every cleaning, just boil water in it for a while. I think this may be why people don't make percolator coffee anymore. It seems more strong and forgiving. It can be reheated after you come home from work or wherever and still taste good.