Hi Sharon, maybe this will be helpful: https://homeguides.sfgate.com/white-haze-off-granite-sink-25784.html
Is it real granite or composition? If molded into the countertop it's composition, which means it's mostly plastic. Car wax will help it. Just need to reapply as needed.
Hi Sharon: Try checking this site out, it may help:
Just a small ab of olive oil or any other vegetable oil will make the sink shine. It only takes a drop or two on a paper towel after cleaning the sink to make it look great.
I have a red sink that was white fiberglass, and I painted it to match our kitchen. I used high gloss enamel to paint it but then screwed up and put semi gloss polyurethane on it. When I clean it, I use just soap and water, rinse thoroughly, then rub with a soft cloth that has a bit of stainless steel cleaner on it. I know, but for whatever reason, it works on the painted sink, too.