Plus the fact that no one has attributed a rope failure to laundry pen marks, well that is a little key too.According to the UIAA tests, dihydrogen monoxide (DHMO) is a far more serious issue with the strength of ropes-- and I bet you guys are getting DHMO (as well as sand, NaCl, and other salts) on your ropes all the time.I could just about write a book on the kind of BS that goes on with MSDS '