The mold problem is on the sun pad only. The interior is white black and purple and the purple vinyl is different grain than the white and black. This purple seems to be very prone to molding up. Each time I clean it with bleach and it seems to go away after being cleaned with cleaner/conditioner a dozen times while the boat is being used and out in the sun all day. Im really getting worried about this...what can I do? Does anyone else have this problem? Boat is a 2002 and I also started putting pool noodles on the sun pad so the cover don't lay on it.

Running a Fan on a timer half hour on every hour and a half and also have damp rid in cabin and cockpit Also using a Starbright Mold and mildew stain cleaner when needed ( my research shows people in the boating community swear by it). As well im leaving cover pulled back over troubled area at times when suns out and im home to do so. Hope this helps....like I said its just the purple which its a much different vinyl than the black and white in my boat. This seems to have helped over the last couple very rainy days we had.

You are doing the right steps. You can also use a 5 gallon bucket with charcoal in the cockpit.
Also, this is a great product that works well; which I always used for wintertime. As long as you have an extension cord running inside, might as well plug this up.
I kept it on top of a plastic milkcrate.

Will be buying one soon and giving it a try for myself. Might be the golden ticket to my problem!

Bought one of those air dryers and got rid of fan, it works perfect! I put fresh damp rid containers in the boat aswell. They are not collecting any water so the air dryer is doing its job and doing it well!! Love it!