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It is simply 2 magnetic strips that run the entire length. Try to get a utility knife between the two and work your way along it. I had the entire unit off to clean a decades worth of rolled up bugs on the screen after I purchased the boat. I had intended on simply changing it out but when I saw the price I almost fainted. Once off and on the bench it was an easy clean and fix job. Sorry, I'm past 60 so I cannot remember the brand

This will help in understanding the function.