We are starting to get these stains around the edges of the counter in the bathroom and kitchen. It’s quartzite. If happened once before near the seams on the backsplash when water pooled and nobody noticed. That stain eventually dried. But these appear to be getting worse (likely bc it’s constantly used and can’t ever fully dry?) as time goes on. I got manga macchia for an oil stain but not sure what to try on these. Any ideas??