We have a brand new house with an issue in all the bathrooms when you take a shower, the moisture shows up on the painted wall/ceiling surrounding the bathroom. This happens in all bathrooms when steamy, not with cold water, it is not a leak just condensation. We have the vent going the entire time, yet it still soaks some areas of the wall from the steam. This never happened in our last 3 homes even in a very small bathroom. What can we do about it?