Get thee a dehumidifier! It has worked like a charm in our bedroom! I know the clothes drying in there is what caused our mold problem. Keeping the window open in there didn't help at all. In fact, I think the fact that it was so damp outside just contributed to the damp inside. With the dehumidifier you have to keep the window closed. Because the mold in our room was on the carpet I used tea tree oil mixed with water to clean it up instead of bleach. I sprayed the heck out of it, let it dry for a bit, then vacuumed it up. I also sprayed the walls and wiped it off.
There is definitely a damp problem in our flat that goes above and beyond. You can see on the wall where moisture is coming through the concrete and crystals are forming. However, the dehumidifier has kept any mold at bay and we're not staying here forever, so we'll deal with this for the time being.