I washed three of the better mats in the sink with soap and water as recommended, getting rid of a ton of paper, glitter, felt, and vinyl. I also threw out any mats that were cracked. I left a brand new one underneath the cameo4, please use it with the auto blade only, and it should last. Also, do not weed your vinyl while it is on the mat.
The light tack and heavy tack mats are returned to the upper drawer. We still have 5 new mats sealed in the poly bag in the bottom drawer.
Have fun crafting!