First priority is to prevent mold which you do by increasing circulation and increasing temperature. Any time mold is occurring it is because the temperature is too low and you don't have enough air circulation.
To get rid of mold already present use Clorox diluted in water. You should use 19 parts water to 1 part Clorox, in other Words 5% Clorox. Scrub the walls with that.
However the mold will recur if you don't take care of #1 above, in which case you will need to repeat the Clorox scrub periodically.
