My condo has these stainless steel said now with square bottom corners! Attractive to look at, it absolutely a pain to clean! The straight sides that meet the corners are terrible to clean and all too often, residue from everything, from plain dish water to vegetable skin shavings stick to the sides. I used other cleansers, and even soaked the sink in hot water and vinegar and the brown residue is never entirely removed. My neighbor stopped by with 1/4 cup of OxyClean powder and I gave it a try. I mixed it with a cup of hot water to make a light paste, and gently applied it to the corners and sides of the sink. I then filled the sink with more hot water to let it soak. Not to waste the solution while I waited ten minutes, I washed my vegetable crispers in my fridge as well as the interior of my microwave.
I am a convert to this amazing product. The sink was clean as new, not to mention the crispers and microwave. No serious elbow grease required.