Two weeks after purchasing this set of mats, both have lost their stickiness. Most disturbing is that one of the new mats jammed up in my machine mid cut. The top leading left corner folded itself underneath the mat (thus jamming the machine). After powering down and powering back up to eject the mat, there was so salvaging the edge. It has a permanent ruffled edge and is unable of being loaded. The second mat has not jammed in my machine. But it is now cracking at three weeks of being used.