Hi, I was cleaning the wingmirror glass on my Octavia this morning when the glass fell off. I'm assuming the adhesive has just worn out as I had a similar problem (juddering wingmirror glass at high speeds) on the other wingmirror a couple of years ago and the dealership "reapplied the glue" or something.
I was planning on just buying some double sided numberplate tape from halfords and sticking it back on myself, I'm just unsure if I need to remove the existing backing thats still on the car, that I presume is the old double sided tape:
Or can I just stick the new tape on top of the old stuff? The old stuff just seems quite hard to get off.