Quality composite granite sinks are formed under high pressure, making them nonporous, hygienic, and resistant to heat, stains, scratches, and chips. However, cleaning and removing stains from a granite composite sink can be tricky. ... You can typically use mild dish soap and warm water to clean a granite composite sink.

How do you get a stain out of a granite sink?

Take a spray bottle and mix in half water and half white vinegar. You can then spray your whole sink with this solution and gently scrub the surface, paying close attention to any problem areas. Once you're happy you've cleaned the whole sink, rinse all the vinegar away and dry it with a separate cloth.

Do granite sinks discolor?

They can show discoloration/water stains if you have quite hard water, but generally speaking these sinks are quite stain-resistant, just like stainless steel sinks. You may see more discoloration over time in a white/light composite sink versus a dark/black one.