Maybe my prism is just different? All the posts seem to say to unscrew and take off the metal bracket that is attached to the deck
and then push up on the prism and out it should come. Mines the opposite. I cut around the prism as well as the outside of the metal bracket. My prism just lifted out with the bracket still attached. The inside edges of the bracket are slanted for the prism to rest on instead of covering the edges and holding it in(how I thought it was supposed to be). The only thing that holds my prism down, other than the mastic is gravity. Is mine just weird? It's the first time I've done a prism so it came as a bit of a shock to see it in different from what seems to be the normal in the earlier posts. With nothing really holding it down, other than gunk and gravity, I guess I shouldn't be surprised it leaked.