Help, please! The sun screens for my X5 are held in place by self adhesive clips, clasps?..... some are stuck onto glass (rear window) and some are stuck directly onto the (inside) plastic window surround (side windows). I want to remove these clips as they're really ugly and I'm sure they're going to leave a sticky residue, especially on the plastic trim. Does anyone know how to remove this residue without spoiling the finish on the plastic or making a mess of surrounding area?