Step 2 Ā· Clean the Sink Drain Opening
After removing the old strainer, thoroughly clean the top and bottom surfaces of the sink's drain opening. Use a putty knife to carefully scrape away any old, hardened plumber's putty or sealant residue. Follow up with a rag and a mild cleaning solvent or mineral spirits to remove any remaining film, ensuring the surface is completely clean and dry. A clean surface is crucial for creating a perfect seal with the new strainer.