Door insulation or lining has areas that are flat and leak air. I had two areas that I could slide a dollar bill out of on my RV refrigerator door. It is less than 4 years old. I stored it with the doors open and put a clothespin on the flattened sections and came back a week later. Now there were 5 or 6 flatten areas of lining, but where I put the clothespin, it stayed out ok. The lining looks in new condition other wise, and nothing was hitting it to flatten it out. It is almost like it is being sucked flat by heat or something.
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