I use a big heavy pot to boil my daughter nebs in; every night. It is looking pretty ragged from all the use. How do you get the discoloration off the pot from frequent boils? Do you throw yours in the dishwasher? For some reason the dishwasher grosses me out; just not hot enough..would vinegar be ok? I figure the pot is clean inside cause it always boiling water...Anyway, I ordered an electric pressure cooker , I've used it in the past for nebs and it works really well; then pooped out after a year...Just going to use the old fashioned pot in the meantime..