The manual says to turn it off when you are not level. A repairman also told me this was critical for longevity. If you aren't parked level, turn the fridge off until you are level again. This will add years to your fridge life. The rolling down the highway keeps the fridge stuff shook up enough that it doesn't clog up like it will when parked on a slope or hill.
Also keep the freezer full and the fridge is tons happier. I very rarely buy frozen foods, but I discovered a plastic shoe box fits in my Dometic freezer perfectly. I put 2 trays of ice in to freeze, then twice daily or more, empty them into the shoebox until it's full. After that I keep it topped up at every chance, so I always have a big shoebox full of ice for drinks.
When I bring it out for company to refill their drinks, they always ask if I have an ice maker. I do! It's ME. ;D
I also keep stainless steel tumblers in the freezer door and they slip nicely into a foam drink cooler which keeps them from condensating when you set them down. Like having a built-in coaster. The icy cold tumblers are heavenly on hot days and the ice lasts even longer.
A non-RV friend showed up with a half gallon of some half melted ice cream for dessert, and it was easy enough to just scoop the soft drippy ice cream into 3 Rubbermaid twist and seal containers then remove some ice and plop them in the shoebox with the remaining ice. Astonishingly by the time we finished dinner and served the ice cream, it was super frozen again, nothing drippy about it at all. Usually I just buy the pint sized ice cream because it fits perfectly in the Dometic freezer.
When I defrost the freezer (I am fulltiming) I transfer the shoebox of ice and anything else I pile on top of it, then move it to the refrigerator section, then I leave just the freezer door open and the fridge turned off. In about a half hour or so, it's completely thawed out, I can mop up the water with microfiber towels until the freezer is bone dry, then I turn the fridge back on and transfer the shoebox of ice and other stuff back to the freezer. Usually it is still frozen solid and the fridge temp is the same. But the "wet" ice will stick to itself, but later you can fix that.
If you do this shoebox method, then buy an ice pick, cause now and then you might need to chop the ice in the shoebox to loosen it up, but never do this in the freezer. Set the shoebox of ice on a cutting board and gently chop with the ice pick to loosen up the cubes. If you hit it too hard and knock a hole in shoebox, the cutting board will protect your counter top from damage. The plastic shoebox will still work as an ice bucket even with the hole in it, but Dollar Tree sells plastic shoeboxes for $1 so getting a new one isn't a big issue. I have to toss out the shoebox lid, but ironically it fits the Dometic freezers perfectly as an ice bucket accumulator.
The shoebox can be used for projects, like mixing 2 part epoxy on it, then tossing it.
