hi all did you know that our cutting mats dry out thats why you should on a regular time wash them with a soft cloth i have been doing that and it makes a big difference andcleaning them with a scrubby cleans them even though they are called self healing mats they need tender care, i do mine every couple weeks as i use three Omnimats , i do both sides always . hope this helps you all hugs ((((()))) weze