About half of my pipes are straight billiards, and the other half are bents of differing shapes. I can smoke any of my straight-stemmed pipes clenched, all day long, and never get any moisture that gurgles. I can even run a pipe cleaner through it anyway, and still pull it out nearly dry. Why is it when I smoke my bent-stemmed pipes the same way, about five minutes into the smoke I'm running for a pipe cleaner, and using it several times during the smoke? Is this something I just have to live with, or just stop clenching the bents if I don't want gurgle? I'm sure conserving pipe cleaners if I only smoke the straights, but like the bents, too. Anyone else have this experience?