Step 1: Removing the Handle
Next, unscrew the screws at the top the handles. Many sinks have small caps on the top of the knob hiding the screws. If this is the case, gently pry off the caps to expose the screws.
Pull off the knob.
Step 2: Replacing the Inner Handle
Now, you can either buy new rubber O rings, or replace the whole cartridge for about the same price. The metal cartridges are more durable.
Finally, complete these steps in reverse order to reassemble.