For daily cleaning, wipe down the sink with mild soap, nylon sponge or rag. A little all-purpose or glass cleaner can be used, but it's important to avoid ammonia, bleach, or abrasive cleaners on stainless steel. If your sink is stainless steel, after wiping down the sink, use a stainless steel cleaner instead of glass cleaner. Abrasive sponges should also be avoided; all of these can alter the sink's finish. After cleaning, rinse and wipe the sink dry with a soft towel or rag.
cTo clean the caulk seal and around the top of the sink, I like to use a soft-bristle toothbrush soaked with a baking soda paste or a mild soap and gently scrub the rim. Rinse, repeat, and wipe with a soft rag until the rag comes clean. If you have a garbage disposal, I also use this technique to clean the the rubber flap, gently inverting it so you can also clean the underside. You'd be surprised about the amount of gook hiding down there!