Geographical location of the boat makes some difference in how much condensate one has to deal with.
here in the NW, we had a problem and then we fixed it.
if one takes the time to really understand what causes the condensate, and has the means and ambition to remedy it PROPERLY, the first time, the problem will be gone.
too often people make a half a**ed attempt to stop the condensate problem, with poor results.... if they would understand the whys and hows of it, and then use that knowledge to put their heart and pocketbook into it, their problem will be gone forever... everything is a trade off, so you dont get something for nothing.
short of using a dehumidifier, the answer lies in fresh air movement in to the boat, which will displace the moisture heavy air and push it out of the boat... positive ventilation is much better than passive ventilation, and the use of a fan causes positive ventilation and a speed up of the process.... or when used inside the boat, it can move the stagnant air out of the corners and crevices within the boat, so that it can be displaced with fresh dryer air... dorade vents in the breeze is also a form of positive ventilation. without an outside air movement, dorades and open ports become passive ventilators.
if one is living on the boat (either for the weekend or long term), the ventilation into and out of the boat is even more important, but this can cause another problem, which is the loss of heat within the boat.... so then a DRY heat source is needed for comfort.
my fix was to install a Wallas heater overhead in the quarter berth, and ducted it to the v-berth.... the heater drew air in from outside, heated it and delivered it to the very front of the boat, which in turn pushed the moist air out and thru the small gaps in the sliding hatch... this stopped the condensation, AND made the boat smell fresher.