I purchased a countertop 6 years ago that was sold to me as a whitish ( forgot the official name) quartzite. Well here we are with terrible dulling of the stone, despite sealing it as recommended, and a chip by the sink. Don’t care about chip so much as the dullness. Was told to use stone enhancer a few times THEN seal it. Can’t find stone enhancer that is not Aldo a sealant. Any advice?