I also use the Krylon Easy Tack adhesive spray and let it dry. Then when you are done cutting put a layer of waxed paper over the glass matt. It seems to work for me so far. Once you need to use new adhesive wash the glass matt and dry it then respray.
I don't use thick paper in the slice either, but the regular cardstock you buy at Michaels or other places seems to be ok. I've tried to use Gina K's paper it is nice and thick
and the slice had trouble cutting it.