i don't know how many times i've tried patching my thorn resistant tubes in the past few days but its a lot. (and for review - what makes them thorn resistant? thicker rubber, nothing more) they always fail in the same manner - a blister forms over the puncture which grows until it finds the edge. the exact same technique works perfectly on normal tubes.

if we didn't think of these as bike tubes, how would we patch it? what kind of tube uses thicker rubber? this stuff isn't rocket science even if it varies a bit from normal cyclist technique.