Bathroom Faucets Leaking. If you have a two handle centerset faucet, remove and clean the aerator. Gently pull out the cartridge and replace it with a new one.
Using a thin-bladed screwdriver, carefully pry the caps out of both handles. Remove it, and lift off the handle and escutcheon. It is possible that your sink or faucet may have multiple problems at once and this can contribute to the leak.
Turn it off and check if the faucet is still leaking.
If the faucet is still leaking, you might have another issue.
Rethread aerator onto the faucet: If the leak stops, you fixed your spout base leak. It is possible that your sink or faucet may have multiple problems at once and this can contribute to the leak. If the faucet is still leaking, you might have another issue.
Clean the faucet and valve seat regularly, especially with professional help if needed. This causes staining and damage to walls and floors. Make sure the handle is in the off position, then turn on the water by turning the knob under the sink counter clockwise. Turn the nipple clockwise until it tightens. For handles that come with a cap, pry it off and unscrew the screw beneath.