Waterproof layer starts delaminating after a few months months of use

These are alright. I really liked them at first because it's great to grab one to change baby on and they're small enough to keep in the diaper bag as extra protection when changing a messy diaper. The only problem is the waterproof layer on the back of pad is wierd after washing. I've never dried them so I'm not sure what is causing this to happen. It's as if it's delaminating. It feels as if it's melting or something. It really looks like what I would imagine would happen if I dried them on very high heat.

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