I seem to have accumulated a good number of carabiners that, while probably still safe, I won't climb on anymore. They might be worn, of questionable origin, or just plain made obsolete by an upgrade. ...
It happend to me a couple of times now that I've cross-loaded my carabiner when belaying; the frequent change from slack to tension and back, moving the carabiner up and down and all that, can easily ...
What does it mean to cross load a carabiner? I know it's bad, and not to do it, but I don't really know what exactly it is.