We use the two dividers that are in the fridge and freezer door containers / racks. Just remove them, hang them on the door latches and close the doors. That keeps the doors secure but slightly open allowing air circulation preventing mold growth or that musty smell from developing.
Scott, Becky & Heidi (our standard poodle and travel companion)
Remember... No matter where you go, there you are...
2009 27FB International Ocean Breeze
2010 Toyota Tundra CrewMax, 5.7L V8, 4x4