- Start by removing the worn tip and scraping the end of the cue (called the ferrule) with a utility knife to remove any residue left by the leather and glue.     - Use the knife to cut a grid pattern in the ferrule. This will help the glue to bond better.     - Rub the flat part of the tip with sandpaper  (the side to be glued) to remove the varnish.     - Dab the glue very gently on the ferrule and the tip. The aim is for the glue not to ooze out over the sides when you stick the two surfaces together.     - Press the shaft down vertically, with the tip against your work surface, to ensure the glue bonds well. Keeping the cue in this vertical position, cut the edges of the tip so that it is perfectly aligned with the ferrule.     - Finally, use sandpaper to give the tip its curved shape and make sure it is properly aligned with the shaft. Use increasingly fine sandpaper to protect the wood of the shaft.