Chemicals used in carpet making and cleaning solutions will accelerate the degradatiion of a Limbsaver pad.
ALL recoil pads degrade with the passage of time, it is the nature of the materials used to create them.
Prevention, don't leave a Limbsaver pad resting on carpet or even the foam in most gun safes.
Put a piece of metal or wood down for the pad to rest on & problem solved.
I have Limbsaver slip on pads for rifles & single shot shotguns and perma pads for two Mossberg 500 shotguns.
I have had no problems with the pads disintegrating or losing effectiveness in the 10+ years I have owned them.
So you are saying a thin piece of plywood or lujan would solve the issue? I didn't have the safe when I first put these on. They were just in a closet on hardwood floor. It seems once this starts, there is no stopping it. The ones I took off are not on the plasticy safe carpet, yet anything the touch still gets stuck to them. I guess once it starts, it keeps going.
Does the new ones have any sorta warning in the package for this? I'd bet 75%+ of these get put in a safe with carpet floor.