another great use with q-snap frames is the rubber claps for thread spools. place them on the edges (on top of your work) and helps to keep them snug. found a huge package on amazon for $20
When someone visits this page from a link you share, you will be rewarded
I use quilt batting between the snap and the fabric and that helps a lot! I wont put beads in a Qsnap though - I will typically just bead in hand at the end.
As others have already said, try to put something between your fabric and the clamps. You may also want to twist them a little to un-stretch the fabric when youre done stitching for the day.