I soaked my mat once. Cleaned it with mild dish soap and scrubbed lightly with a soft brush. The next few times I used it, I kept getting a zillion fibers stuck in my mat. Everytime I rotary cut any fabric I got the same thing - more fibers! I'm just not sure I want to soak it again. Took a long time for it not to do that. It's working just fine now. Anyone else ever have that happen to them?