How can I reduce the humidity in my home?
If your house is too humid, it's because too much moisture is entering it. To fix that, you need to find the source of the moisture and reduce or eliminate it. 

There are lots of places the moisture could be coming from. Humid air might entering your house from your crawlspace or basement (especially if you get water pooling after heavy rains), leaks in your roof, or leaky pipes are all common causes.