Cleaning mold in compartment

After receiving my boat back from storage, I found some mold on the carpet in the compartment behind the helm. This was probably caused from the boat being outside and getting wet before being stored. Regardless, I used an air purifier that sends out ozone and is supposed to kill the mold and the smell is gone, but the mold obviously remains. I got some 3M marine boat soap today, but don't know the best way to approach this. I have attached some pictures of the mold.

Secondly, what can I use to reduce moisture in the boat in general? My boat stays on a hoist and my pontoon in the water, so they are subject to the humidity outside and I looked at humidifiers online which would work well to put in either from time to time but they are a good amount of money. Are there any smaller versions to the large home-sized ones or dry packets to use from time-to-time?

Thanks