The button that holds the rear view mirror to your windshield is glued to your windshield with a special form of epoxy that is super-strong. There's a good reason for this, of course. The mirror button must be able to withstand extreme temperature variations.This makes removing the button a slow process, but, with care, one that any enthusiast can accomplish.
Remove the rear view mirror. Insert a tiny flat-bladed screwdriver into the slot at the base of the mirror button and push upward gently until you feel the internal locking mechanism open. Wiggle the mirror slightly and pull up on it. Be firm but gentle as it is possible to crack a windshield using too much pressure.
Work your razor-blade utility knife gently around the edges of the button, cutting into the adhesive slowly. Go around the button at least three times, cutting slightly deeper with each pass.
Insert the blade of your flat-bladed paint scraper under the edge of the button, between the button and the glass and gently pry up on the button. Be firm but gentle. Move your paint scraper around the edges of the button, prying from as many different angles as you can.
Continue working your knife around the edges of the button if the button fails to pop off following Step 3. Cut deeper and deeper into the epoxy with each pass of the knife around the button.
Insert the paint scraper under the edge of the button again and gently twist. Move the scraper around the edges of the button, prying from different directions. Be patient and the button will eventually pop off.
Scrape any residual glue off your windshield with your razor-blade utility knife, being careful not to scratch the glass with the tip of the blade.
