Keeping your refrigerator door open when you are not using it is important to keep it from getting musty and moldy inside. Here are a some options!
Camco 44105 RV Adjustable Fridge Door Block https://amzn.to/3VT4rhZ
Dometic Door Airing Card https://www.dyersonline.com/dometic-7-9-cuft-refrigerator-door-airing-card-shelf-divider.html