rust in bathroom sink

judylblack

I am seeing rust around the drain in my 2022 320 S.  I have cleaned it off several time but it reappears even while it is sitting on the driveway with the tank and lines drained. Anyone else having this problem? I have only filled the tank from my home faucet. I have city water and no excess iron. This is not happening in the galley sink.

XenanMe

I have that in my galley sink drain.  Have never been able to figure out what causes it.  But Bartenders Friend cleaner seems to remove it.