A couple of things here. I would bet the screws holding that awning bracket are loose. I had a problem in the same spot. One of screws was only screwed into the fiberglass siding. You could never get it to tighten up. I tried different things , bigger longer screws & steel wool & other things for the screw to grip. So far it has held ......
Caulk. No silicone !! Don't use 20/20 . Sticks really well but no good in spots where the hot sun can hit it. Gets sticky when hot & attracts dirt. I had a lot of it on my rig & I just got done removing most of it. Heat gun , 3M General Purpose Adhesive Cleaner , time & a lot of elbow grease!
I am using OSI Quad color caulk as close as I can get to a color match. This is a caulk I was told to use by tech who works on RVs . But he also recommended 20/20 ..............
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