I picked up a flyer from an Olfa dealer at a quilt show last year regarding "Caring for your OLFA Rotary Mat." This is what it says:

To clean your OLFA mat, use a generous amount of room temperature water and a few drops of mild detergent. Use a soft, mild bristle brush to create a lather and gently clean your mat. Rinse with room temperature water and wipe dry with a cotton towel. Please note that warm or hot water and direct sunlight may damage that mat.

Hope this helps.

Thanks Evie, I appreciate you taking the time to find this information.

Yes thanks for that info...

I read that you first lay your quilt in a tub of water with 1/4 cup of white vinegar to each gallon of water, let it soak for an hour, then use a mushroom brush (or gently use the scrubby) and its' like new. I did this to my 2 oldest mats and they are beautiful again. Think I heard this on Fons and Porter but I'm not sure

Wow did not know that will try soaking my mats tonight.

My mat is too big for my bathtub. I use a soft brush and room temp water with a little bit of dish soap, I wipe it off and let it dry. When storing, I put them under my bed and a towel over them to prevent dust

Try "whisking" w/blue painters tape to get rid of threads and "fuzz."

I can't find it but this has been discussed here before. And it is the concensus that yes, you can slip your mat into the bathtub to rehydrate it.

I didn't know this either - thanks! The things we learn here :)

I'm new at this sewing/quilting craze and I have never heard of wetting my cutting mat. Could you refer me to where you got this information? Oh....and I say craze....because I am so hooked on quilting I find it hard to sleep sometimes for thinking of how I could make this quilt or that quilt. Thanks. Love reading all replies and questions.