My son loves to play with water in the washroom sink.
With him filling it to the top water has gotten inside (nt sure of the proper name) the hole that is at the top of the sink (I guess it's there for overflow purposes??).
It now has a not so nice smell of mildew.
Any ideas of how to clean it???? Can you pour bleach or something in there? Where will it end up?
Thanks in advance!