Ventilation fans in bathrooms, too, might be appropriate. Although it isn't as bad as say, Antarctic rain squalls or whatever, bathrooms are very damp places even after the shower is turned off- best to move the damp air outside rather than let it spread through the house as the bathroom tries to dry out. Bath towels, bathroom rugs, etc. that hang in the bathroom and slowly dry out are also chronically damp. Older houses also seem to have very small bathrooms and little window space for airflow. I live on the coast in California and to a certain extent the dampness is just part of life near the ocean- stuff just dries more slowly here than inland and the rel. humidity is always @ ~70-80% most days anyway. Victory over the dampness may only be relative, and in small degrees.