I
First, note I did not look at the pic...don't need gross before breakfast.

Second, we have a pinkish residue that builds up around sink drains over a period of a month,
but is easily scrubbed away with Comet, Soft Soap, or something similar. We have a new water
treatment plant, and apparently this is a harmless bacteria, according to testing by officials.
Maybe it is something in the water at your house.

(Also note: I had one of the B &D power scrubbers, thinking it would help clean soap scum off a
glass shower door. It worked o.k., but was more trouble than it was worth. So I tossed it.)

N.