Keeping countertops clean is part of everyday life, and many homeowners instinctively reach for familiar products like Windex. While it works great on glass and mirrors, using it on stone countertops is a different story.
So, is Windex safe for granite, marble, or quartz countertops?
The short answer: no.
The Problem with Windex on Stone
Windex contains ammonia and alcohol—both effective on glass, but potentially harmful to stone surfaces. The impact varies depending on your countertop material, but the recommendation is the same across the board: don't use Windex on your countertops.
Granite is typically sealed to protect against stains and moisture. Over time, ammonia and alcohol can break down that protective sealer. Once it wears away, your granite becomes more vulnerable to staining, loses its shine, and is more prone to long-term damage.
Marble is one of the most delicate countertop materials. It reacts poorly to acids and harsh chemicals, making Windex a particularly bad choice. Even a single use can cause etching—those dull, cloudy spots that won't buff out. Fixing this kind of damage typically requires professional refinishing.
Quartz countertops are engineered with resins, making them non-porous and more resistant than natural stone. Windex probably won't cause immediate damage, but frequent use can dull the finish, weaken the resin binders, and potentially void your warranty.
What to Use Instead
For a simple, safe routine that works on all three surfaces, stick to warm water, mild dish soap, a pH-neutral stone cleaner, and a soft microfiber cloth. Avoid abrasive pads, powdered cleaners, and anything with harsh chemical
Disclaimer: All countertops are different. Always follow your manufacturer's instructions for cleaning and maintenance. The information above is for general guidance only and should not replace specific care recommendations for your surface.
