Try washing it first, or use a baby wipe, this can help in the short term. And I like Krylon Easy Tack. Just make sure to put masking tape or painters tape (something easy to get off) over the pink edges so you only get spray on the adhesive part.
Nope. I wash the mat, just with regular dishwashing liquid, and scrape off any bits of paper or glue gobs that may have formed, but as long as it's a relatively smooth surface I just mask the border with tape and spray on a new layer
I went to Micheals today and bought Aleens tack it over and over, a xyron repositionable refill and Krylon easy tack spray. ( wanted to cover all my bases LOL)
The Xyron I took the refill apart and just using the sticky part I applied it to all of the mat, I found that the backing wanted to keep hold of the tape but working slow i got it all down, I cut a few things it seemed to hold ok.
Then I masked off another mat & spread a thin even layer of the Aleens on it with a foam brush, let it dry and tried that OMG that stuff sticks! It cut wonderfully but was too sticky, I was told later tonight to thin it 1 part glue to 1 part water. i'll try that tomorrow on another mat.
I did not try the spray. I think i will stick with the Aleens.