So many times

I haven't ever thrown out unopened ones but I have thrown out ones that were so nasty that I wasn't willing to even try and clean them.

I have thrown away pans because They were just to big a job to clean.
But never my favorite ones lol just the cheap small pots. Plus Cake pans and cookie sheets lol

We have a scrap bin. Someone forgot to put a bag in there and never cleaned it out... next time I opened it it was all grey fuzz