Oct 03, 2019 · To maintain a quartz countertop, wipe it down every day with a soft rag, warm water, and mild soap. If you''re dealing with a hardened spill or buildup like gum, grease, or paint, scrape it off gently using a putty knife. Apply an adhesive remover like Goo Gone or isopropyl alcohol to get rid of tough stains, then wipe the surface with a soft