Marble Shower Soap Scum
QUESTION:
How do you remove soap scum stains on shower floor?
ANSWER:
You could use a dilute ammonia and water solution (1/2 cup ammonia to a gallon water), but this is not good for regular use. The ammonia will eventually etch and dull the marble.
I'd recommend you use
MB-3 Soap Film Remover. It's formulated for safe use on marble and (in my opinion) the best product available.
Good Luck,
Ryan

I highly recommend
MB Stone Care Products to maintain all your marble, stone and granite countertops and floors in optimal condition. I've used other good products (Stone Tech, Miracle) but found
MB Stone Care is the most reliable and effective.