Hi I have the typical water in the boot well problem that seems common with Fiestas. So far I've replaced the seals on the tail lights and the rubber grommet on the rear wiper. Today it's raining and I can feel water under the top of the boot seal. Is this thick rubber seal OK to pull off? Is it held in place with adhesive or very tight fitting? I think I need to remove across the top and pull back the roof lining to see where it is coming in.