What are the two main reasons hook-and-loop fastener sticking power disappears?

Answer

The physical gripping mechanism wears out or the surface bond fails.

Hook-and-loop fasteners fail due to one of two primary issues: either the mechanical engagement between the hooks and loops is compromised, or the adhesive bond securing the fastener to the mounting surface has detached.

What are the two main reasons hook-and-loop fastener sticking power disappears?
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