Yeah, Since I’ve seen this come up several times, I thought I’d check mine. I have a few sheets, and all seem good except one. That mask is so stuck on there, and I haven’t even put it under the laser yet. It just wants to tear off in pieces. Good tip about the water, I’ll have to remember that when the times comes to use that sheet.
Edit to add, I’ve also seen people mention pulling the masking off, and putting it back on again before engraving. Then it’s not so sticky after the laser…but I can’t even get it off that one sheet of mine before the laser. I feel your pain.