Phil is right on, cut the old wraps on the top of the guide feet and you can remove the guide, then painstakingly you can remove the rest of the wrap using just a thumbnail. It does help a little to hold the rod under some hot tap water just long enough to heat it up a bit. don't use anything sharp edged like a knife blade to scrape with though, that could spell disaster. Final cleanup with a little acetone will leave it nice and clean ready for your new guide and wrap.