I have to nest my cooking pots and pans. I have noticed that on the pots the non-stick coating seems to have worn off close to the rim on the handle side. I suspect that is due to nesting them together. I protect the bottom of the pots by having a paper towel inbetween but it only covers the bottom. Any suggests on protecting the edges? I guess I could take the time to put another paper towel between where they touch on the edges, but I thought someone might have a more creative idea. Thanks in advance.