Never heard of this one.
My frig's cooling fins frost up all the time, and never have any issues with cooling.
Because you say it will work again after you wipe down the fins, I suspect a 12 volt electrical grounding issue. I would pull the back access panel off, and look at the control board. Check all the electrical connections. Ultimately, is sounds like control board or a manufacturing issue in the cooling fin.
FYI, not sure if this is your first RV or not. The cooling fins are connected to the 12 volt ground.
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