re: Interior of cabinets sweating.

I have similar problem with cabinets in upstairs bathroom, on exterior wall of brick house. I know the house walls are not well-insulated, and we have it cold at night in that part of the house. I've tried using DampRid in the cabinet, running a dehumidifier, and leaving the cabinet doors open...I've come to the conclusion that my best bet is to spray a clear sealer on the bricks every few years, to minimize the moisture migrating across the porous bricks and mortar. Other option would be painting bricks.