Here are some steps you can follow to clean your Blanco sink:

1. Wash out the sink with hot water and soap.
2. Use bleach if necessary.
3. Use baking soda to remove hard stains.
4. Scrub away residue.
5. Rinse the sink with warm water.
6. Use mineral oil.

For black Blanco sinks, you can use a solution of vinegar and baking soda to clean them.

Here is another step-by-step guide for cleaning Blanco sinks:

1. Rinse the sink with warm water.
2. Apply a small amount of dish soap or Blanco cleaner to a soft sponge or cloth.
3. Gently scrub the sink, paying special attention to the corners and crevices.
4. Rinse the sink thoroughly with warm water and dry it with a soft cloth.