The Velcro on the door to hold the canvas has come off. I took the door apart and see the Velcro was actually connected to a plastic insert. I removed the insert and am trying to get the Glue residue off of it but am having a very hard time. Called Forest River and they are no longer carrying the plastic. Here's my question - Would you continue to try and remove the glue residue and only apply the Velcro to the plastic and put it back in or would you attach the Velcro directly to the Aluminum door frame? Anyone have any idea if the Velcro sticky back would stick to the Aluminum very well?