Removing a car's blind spot mirror from the car's actual side mirror can be a difficult task, if you don't know how to remove it properly. But if only you have the knowledge to remove the car's blind spot mirror, then this task will become so easy that you would wonder why you never thought about it before. Since the old blind spot mirror had been stuck pretty hard and tight using a permanent double sided tape, removing it will prove to be difficult.
When I first tried to pry out my old blind spot mirror which I wanted to replace it with 3 inches size blind spot mirror, I almost broke my car's side mirrors. I used my strongest fingers to try yanking the blind spot mirror out, and I felt my fingers hurting much. I wanted to use a flat head screwdriver to use the leverage to remove the old blind spot mirror and I realized that I could be scratching my car's actual side mirrors. So I dropped that idea and was brainstorming an easier way to remove my car's old blind spot mirror.
I searched the internet for answers and solutions, and one idea particularly came to my liking. It was such a simple physics principle that I questioned myself, why I haven't thought about it before. The answer was to use a hair blow dryer to concentrate hot air on the old blind spot mirror. This makes the permanent double sided tape between the old blind spot mirror and the car's side mirror, becomes soft and less sticky. Due to the heat produced by the hot hair dryer, the sticky gum in the double sided tape turns semi liquid allowing the old blind spot mirror to be yanked out, and removed. You may need to use the hot hair blow dryer a bit longer if it is winter time, otherwise if it is summer time, it takes much faster time to remove that old blind spot mirror.