hmmm.....i've never needed to buy a new mat. When i cut fabric, little bits of lint get stuck in the grooves, this is normal. I sweep it off with my hand. And every once in awhile, i run the mat under water. These mats are self healing, and when cleaned, with water, they should look brand new. I have a blade sharpener paid 20 dollars for, works great, i dont buy blades or mats.