About every third or so trip I pressure wash my entire boat inside and out I pull out the Tubs and trash can and spray out everything Transom and all..
In order to keep everything from molding. I have built up a Blower out of a home AC unit to provide pressure in the hull.
I have a cut out board after I pull out my inner tub it is so powerful it hovers the lids open just a touch and in 1 or two hours my whole boat is completely dry. The lock channels in the center tackle lid Blow perfectly across the 3700's if I stop up the drainplug It pressurizes every hatch.