What to do:
-Regularly clean your sink with a mild detergent and/or water that is applied with a soft cloth or sponge.
-Rinse and towel dry after every use in order to prevent mineral deposit build-up
-Once a week apply a deep cleaning with a recommended cleaner “suitable for stainless steel” and using a soft cloth or sponge
What NOT to do:
-Do not use coarse abrasive powder, metallic scourers (i.e. steel wool, brushes, etc.)
-Do not use “silver cleaners”
-Do not leave wet sponges, cloths, cleaning pads, rubber mats or dishpans in the bowl of your sink which could lead to surface rust or “pitting.”
-Do not leave mixtures of chlorine bleach and water in the sink and always rinse the sink after using such solutions.
-Do not leave liquid soap or other cleaners to dry on any surface of the sink.
Stainless steel does scratch over time. These are normal and will eventually blend in with the finish of your sink. This said, there are a couple of things you can do to diminish stand-out scratches. First, use a nylon pad, such as Scotchbrite, with an iron-free polishing compound. Second, make sure to follow the “grain” of the original polish as you gently rub the area with the scratch. Make sure to be gentle.
Hard water can develop lime scale build-up on your sink. Regular cleanings as described above will reduce such spots. If water spots still exist, soak your sink using a water solution with 25% vinegar and 5% nitric acid while periodically using a nylon brush or pad. Do not forget to rinse and towel dry as usual.
The vast majority of rust is not part of the sink itself but rather the presence of iron particles or having come in contact with iron-containing materials (i.e. cast iron pots and pans). If these rust spots due appear, rub the spot with a sponge and water solution of 15% nitric acid. Avoiding the extensive use of iron-containing materials is the best option.