Step 5 · Clean the Sink Surface
With the old faucet removed, thoroughly clean the sink surface around the mounting holes. Use a plastic putty knife or a non-abrasive scraper to remove any residual plumber's putty, silicone caulk, or mineral deposits. Follow up with an all-purpose cleaner and a rag or sponge to ensure the area is perfectly clean and dry. A clean surface is essential for a good seal with the new faucet.