Dash Cam Adhesive Pads Continually Failing--What's Worked for Yours?

You should clean glass with acetone. alcohol leaves a residue which can hinder adhesion. Regarding double-sided adhesive tapes, I prefer 3M VHB - really aggressive, but only if the surface to which it is adhering is clean!

Ditto to the 3M VHB. It's actually meant to replace welding in assembly line and it's what GoPro uses for their mounts that are attached to the outside of cars and planes.
 
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