Our new 36'Hunter is starting to grow mold. Being in Seattle, she stays at the dock all year. I got a Soleus low-temp dehumidifier. Anyone out there use a de-humidifier? Do you leave it in the boat at 50% setting when you are not going out for a while? How dangerous is the little spark that occurs when the thermostat goes on and off? Really want to get this problem under control.