In reply to kwoods:
When you say split, has the skin cracked and split? I've never had that happen but I regularly go through my tips due to rough grit wearing them down until they bleed.
After a rest day after I just tape them up and climb on them again, I don't necessarily get anything productive done because climbing in tape is a pain, it can take up to a week for there to be no trace of the tip going through (I generally heal quite slowly though).