Typhoon I bought some gel cleaner off Amazon that cleaned up the gasket quite a bit. Also ran some of those cleaner pods through it, but not sure what that did.
Our gasket actually leaks a little bit at times, but an old dishtowel catches it. My kid somehow closed the door and ran it with a piece of clothing inbetween the door and gasket and it put a permanent crease in it. A couple pieces of electrical tape help seal it. MacGyver would be proud