If you scratch your LCD screen when you are using your stylus, the rubber dome at the tip of the stylus is worn away. Using a stylus with a worn tip could cause irreversible damage to your LCD screen. To prevent this from happening, you should replace the tip with a new tip.
Some styluses come with a replacement tip. If yours did not, you require a Replacement Tip Set suitable for your stylus.
Note: If a Replacement Tip Set is not available for your stylus, you will need to replace the entire stylus.
How to Replace the Tip of My Stylus
For instructions on how to replace the tip of your stylus, see Instructions for Replacing an Active Stylus Tip and follow the steps.