What does Chrome - Nickel content mean in Stainless Steel?
It is the percentage of Chrome and Nickel in the Stainless Steel. Chrome gives Stainless Steel the luster and durability while Nickel provides hardness and strength.

Why should I dry my stainless steel after rinsing?
This is standard practice for all Stainless Steel Sinks sold today. Unless distilled water is used, water that comes from your faucet will have different types of minerals and salts. As the water evaporates, trace minerals and salts are left behind.

If you dry your sink after using, hard water spot deposits are not left behind. If necessary, you can use white vinegar to remove hard water deposits, then rinse and dry your sink after the spots are removed.

Does Stainless Steel rust?
Stainless Steel actually DOES NOT RUST, although rust can form on the surface of any Stainless Steel and appearing on the surface only as orange or red rust marks. This surface discoloring can be traced back to one or a combination of three typical sources.
(1) Steel wool pads that you used for cleaning.
(2) Tin cans or cast iron pots left in the sink while wet.
(3) Iron deposits that are left behind from your water.

What are the stains or residue at the bottom of my Stainless Steel Sink?

The surface stains can be removed as described above in water deposits and surface rust spots or a STAINLESS STEEL CLEANER can be used as well.  ALWAYS CLEAN towards with the GRAIN of the FINISH. 

Rinse and DRY to complete any cleaning process.