The TSP in Cascade is wonderful for stain removal. Not all dishwasher detergents have it. I have used it to clean out old coffee pots and it works like a charm. Had an old electric percolator that belonged to my grandmother, never been cleaned out, other than hand washing. Developed a nasty stain inside. Since I'm not a coffe drinker, I was wanting to use the pot to heat water. Running a perc. cycle with about a tablespoon of Cascade to clean it was just the ticket. Also soak the hot tub filters in a bucket with Cascade in it. Blah, blah, blah, after all of that, my point is, Cascade and the dishwasher should do it. (I feel as if I just presented an infomercial for Cascade! :oops:
M