I made a mistake in using a glitter paper where the glitter adhered to the machine and mat.  A huge mess,  A survey of You Tube videos and I followed the instructions of using Goo Gone Gel to clean the mat and restore the tack with Loctite 100 Lite ( a little challenging to find but did so at Joanne's).

The mat cleaned up beautifully and the tack was restored to its original strength.  I do keep the dust cover on the mat and, admittedly, am not a daily user.  Still, the performance of the mat is unchanged from that first rookie error.

What seems to be missing from previous reviews is that they sprayed their mat with a light adhesive.  Granted, the tack shouldn't disappear after a few uses - and that wasn't my experience before Glitter Gate - but it can be restored.