Oh my, oh my. This is not complicated. Of course you can wash the bags sold at Walmart and grocery stores. I have done it many many times and they come out great. As for the young lady who can't see herself going into the store with an armful of bags, as you unpack your groceries at home, fold each bag and then place all the folded bags into one bag. When you get to the store just grab it and go. The only bag that needs washing is the one with meat in it.