As Rondo says, it pays to be gentle with the fins. I also do it once a year. Another reason to clean out under there is to make sure the mud daubers haven't nested in there.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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