How to take off double sided tape

Remove stubborn, stuck-on tape with a hairdryer. Plug your hairdryer into the nearest power outlet and turn it on to a medium or high setting. Hold the hairdryer a few inches away from the tape and let the hot air blow over it, focusing on the edges and corners. This will cause the glue to soften. After a few minutes, set the hairdryer aside and try to pick at one of the corners of the tape with your fingernail. Most of the tape should come off, but you may need to take the hairdryer to it again.

Wash any residue using water, vinegar, and soap. Mix 2 cups (275 milliliters) of water with ¼ cup (60 milliliters) of vinegar and a few drops of liquid soap. Dip a sponge into this solution, then scrub the affected area on your wall or door using small, circular motions. This cleansing solution is mild and should not remove most paint; however, you might see some fading.

Gather your supplies. If you have some double sided tape stuck to your window, you cannot use heat or you will risk cracking the glass. You also can't use anything too abrasive, or you will risk scratching the glass. Instead, you will need to dissolve the tape using oil. Here is a list of what you will need:
Butter knife (you can also use your fingernail)
Window cleaner
Sponge and glass scrub
Cooking oil or cleaning oil (mineral oil, Goo Gone, etc)
Rubbing alcohol

Try to remove tape as much as possible. You can do this by picking at one of the corners with your fingernail. You can also use a butter knife or pallet knife, but take care so that you do not scratch the glass.

3
Spray the tape with window cleaner. If you do not have any window cleaner, you can make your own by mixing together 2 cups (275 milliliters) of water, ¼ cup (60 milliliters) of vinegar, and a few drops of liquid soap.[2]

4
Buff the soaked area with a sponge using small, circular motions. This will help dislodge some of the stuck-on residue. If your sponge has two sides (a soft side and an abrasive side) try using the scratchy side.

5
Consider using oil and a glass-safe scrubbing sponge. If the glass cleaner or vinegar solution did not remove the tape, you will need to saturate it with some cooking oil (such as olive oil) or a cleaning oil (such as Goo Gone or Goof Off). Spray the oil onto the affected area and buff it with the sponge until there is no more residue.

6
Clean the glass with some rubbing alcohol. Soak a soft cloth with rubbing alcohol and rub it until you have removed all tape and oil residue.
If there is still some tape left, buff it again with a glass-safe scrubbing sponge soaked in oil, and then clean it again using rubbing alcohol. The rubbing oil will get rid of the oil residue and evaporate, leaving no marks.

What the guy said above! Thanks random person