I have a very nice #8 lid that seems to have water scale (?) on the inside. Noticed it after the lye bath. After 6 hours in the electro, 3 two hour runs, very little of it has come off. Tried SS scrubbie and SS wire brush. It is in a vinegar bath for another try right now, although the first run there didn't do anything. Any suggestions? CLR maybe? About ready to just sell it off as is. Ugh