All we've ever done is clean it with vinegar (full strength), wiping everything down. Then, spritz the entire inside, again, with full-strength vinegar and keep the door open just a quarter inch. With the second spritzing, do not wipe. Vinegar is a natural disinfectant.
That's it. If you have a moisture issue, then any of the products that soak up moisture can be used and left in the fridge.
No longer RV'ing