In this video, I install a gadget called the RV Bug Stop onto my Challenger RV screen door. Then give you a quick demo of it in action. The device is an aluminum bar with a plastic hook and internal spring. RV Bug Stop sucks the middle door slider closed automatically. No more forgetting to close it, letting in bugs!
Installation is done with no tools. Simply peel off the 3M backing, line it up on the door frame, and stick it in place. The 3M adhesive looks to me like VHB (Very High Bonding) type, so it should last.