Perhaps there are just 'unlucky' pairs, like ones where the denim is defective? I have a pair of Vicodin crystal fleurs which feel thicker than some of my other blends...there should be a sticky though. So far, I think the 'rippers' are:

Vicodin
Xanax Pink (has this happened to the Blue too or no?)
Radion
Addict
Other 67/33 blends.
Anthrax.