I lived in a small studio in a damp part of SF and we discovered mold growing behind a beureu, I had cold like symptoms for months before which I think was related to a mold allergy. We moved all furniture away from wall, cleaned with mix of bleach and water then invested in a $200 Frigidaire 50 pint dehumidifier (like this one Frigidaire FAD504DWD Energy Star 50-pint Dehumidifier https://www.amazon.com/dp/B00AU7GYXA/ref=cm_sw_r_cp_apa_n8i7...) and it solved the problem for us. It would pull a gallon or more of water out of the air everyday. I tried some smaller/cheaper dehumidifiers but they really didn't compare.