1st post - happy to be here - i look after (maintain) a few houses here in italy and the local plumber - while good at what he does - sometimes doesn't have a clue.

one of our clients has condensation collecting under her kitchen sink. it never happened before and now, sometimes it does it and sometime not. it's a double, stainless steel sink with one larger and lower than the smaller one beside it. the smaller sink has a garbage disposal unit connected to it and does not attract condensation - just its larger, lower neighbor. both are contained in a wooden surround with double doors that's open at the back, against a cement plaster wall. the walls are quite thick; stone on the exterior.

insufficient ventilation might be the cause ... but why one sink and not the other? ... why did it just start happening?

any and all suggestions gratefully received.

grazie - bill