I have a 175 bayliner br and have a really nice custom cover, I give her a good wash after taking her out and let it dry as best it can for a few days before i put the cover on it,(this is only if i know i will not be able to take her out on a weekend, otherwise i leave the cover off) I then get out my shop vac and suck all the water out of the bilge, the left over that it does not get. Then wipe it down. Now the carpet is still damp but i put the cover on anyways. I do go out and take the back of the cover off when its a nice day outside. Anyway I do have a cover vent i just have not installed it yet. what do you guys do?