1.Use a hair dryer. Plug the hair dryer into a nearby power outlet, and use the high temperature setting to blow directly on the double-sided tape for a few minutes. Then remove the double-sided tape by hand or with a putty knife.

2. You can also use a steamer or an electric iron to heat the double-sided tape, because the water vapor will help melt the adhesive.

3. Use masking tape. Heat the double-sided tape with a hair dryer, and place a strip of masking tape over it (hold on to the corner of the masking tape). Peel the masking tape off the wall, if you're lucky, this will help you remove the double-sided tape. You may need to repeat the procedure several times (with a new piece of masking tape each time) to completely remove the double-sided tape.

4. Use fishing line or dental floss. This method works best with double-sided sponge tape, which sticks more tightly than regular tape. Using both hands, pull a length of fishing line or dental floss taut, placing the line over the tape first, then pulling the line behind the wall so that it is snug against the wall. This method should remove most of the tape from the wall. After that, use a small amount of soapy water or WD40 residual tape to remove.