I, too, use a lot of Oxy Clean. For stubborn gunk, though, I just use Cascade detergent, or whatever unscented brand I can get on sale.
I think I gave PBW a whirl some time ago and didn't find it to be much more effective than Cascade.
Anyway, I have a tub somewhere of some brewery wash I bought years ago. I rarely, if ever, have used it in the last 5 or more years.