[A930Rocket]

I've got a question for the brain trust here at PPOT.

Got a homeowner in a house that's just a few months old. A small amount of mold has started showing up on the hall bath ceiling.

This is a secondary bath where they give their 14 month old twins a bath in shallow water twice a week.

There are no water stains, wet seams, or evidence of water coming from above. The Sheetrock is bone dry in the attic, as is the insulation.

The hall bath is divided into two sections, with a door between them. One side has the double vanity with an HVAC vent in the ceiling. The other side has the toilet and tub with two lights and a fart fan.

Any idea what might be causing it?