At the risk of sounding stupid I am wondering if it is time to replace my large cutting mat. When cutting fabric there is always one or more small spots where the fabric isn't cut all the way through. This happens even with a brand new blade in my rotary cutter.
I guess I am wondering if there are so many cuts in my mat that the fabric is pushed down into these cuts and the blade runs over these areas and fails to cut the fabric.
I never cut more than a double thickness by the way.