I had the same experience, different Jackson product, but new boat/new skirt. Definitely get it wet... I put mine on the cockpit wet and let it dry on there too, as that seems to help. One other thing... Jackson plastic is slipperty, so unless you have a plastic rand, you may need to take some sandpaper to the underside of the cockpit rim... it can help give the skirt something to grip on.Thanks gh. I'll try that. The MR is 36 3/4, 21 1/2 the max for the IR is 38, 21.
I figured the extra 1/2 inch wouldnt really matter so I'll try throwing it in the tub. I don't think it helps that I'm trying all this with a messed up shoulder but oh well.