If you want my 2 bits, I wouldn't worry about it. Sometimes they crack. That's all there is to that. I never use a cutter or a punch simply because if they get a little dull they crack caps. (well that's not entirely true, I use a cigar cutter to cut sweet rum twist for my pipe but I never cut cigars with it) I run around the cap with a razor blade if I care and use my teeth when I don't. I don't get cracked caps with the razor blade. I seldom get an uncracked one with my teeth

If they're smoking harsh and nasty that's another story. In that case I would say they really are too dry.