I asked the Featherweight Shop where I got mine and here is what he said:
Aren’t those mats just great! I’ve been using mine for a few months now…I keep it right next to my machine for daily use. I haven’t done anything special with mine for maintenance and there’s nothing on the instructions. If you really feel you need to wash it at some point in the future, I would use cool to room temp water and wool-safe soap. HOWEVER, as thick as this is, drying time could be lengthy. So unless you really feel the need, I’d leave as is.
I use Best Press often and 1 time I sprayed too heavily and did notice a tiny bit of scorching. But when I use it like intended, I’ve had no problem at all. I also use Flatter (which is similar to a light starch or sizing) and I’ve had no trouble with that either.
I hope this helps!
Merry Christmas! And please don’t hesitate to contact us with any questions!
Happy Sewing!
Lou
So I'm just going to use it, wash when needed, and as Onebyone said if it starts to fail me I'll get a new one.