Brought some gels from Home Bargains, which work fine, but very difficult to tear the top off. Thought it was my wet / sweaty hands but now I'm having trouble with High5 gels, too; it's as if they have gone from single ply to two ply, as there is a clear layer inside that I'm finding tough to tear.
So what have others found?
Ps. Can't use teeth - too many crowns.