Our kitchen sink has looked like this since moving in:
Not cool. Not cool at all.
So I did a little pinterest education, and stumbled upon this blog with a perfect how-to for cleaning a porcelain sink. With just 3 ingredients our sink went from this to this:
1. Scrub with dishwasher detergent
2. Bleach it!
3. Scrub with the magical and new-to-me Bar Cleaner’s Friend Soft Cleanser
Donzo! and Cleanzo!
Before and After: