u/Epitome0fAnonymity

My house has black counters in the kitchen and the largest piece is stained. My best guess is that it’s stone sealer that wasn’t properly applied, which shouldn’t be required for this material, since these aren’t natural stone.

I’m wary of damaging the counter with something harsh, but it would be nice to remove the staining. I’ve tried the usual kitchen cleaners and they had no effect.

Any cleaning tips or ways to test the staining to determine the actual cause would be greatly appreciated.