Hi Toni, this tutorial suggests using baking soda, vinegar, and mineral oil
This product works on my granite bathroom sink. https://amzn.to/32z8dRt
Dawn soap and baking soda. Scrub with a tooth brush
No acids like vinegar or lemon juice. Acids will eat the finish over time and dull the manufacturers sheen.
Okay, is this real granite or a man made substitute? If it's natural granite, consider this products: https://graniteprotect.com/ . If it's not real granite, what is the trade name of the product you have? Carronite, Fragonite, Corian, Silestone, Ceaserstone etc. Do your own research and go with a special cleaner/conditioner for this material..