How to Salvage Old Masking Tape
If you've bought masking tape lately you may have noticed that it's surprisingly expensive. You could easily spend $5 or $6 for a single roll of 2-in.-wide tape. At that price, it's important to use every inch of the entire roll.
However, when masking tape gets old, the glue dries out and deteriorates, making it nearly impossible to peel it off the roll without the tape fraying, shredding and tearing. When this happens, don't get frustrated. In most instances you can resuscitate the tape by introducing a little heat. Here's how:
Set the roll of tape on a paper plate or paper towel and put it in a microwave oven, as shown above. Microwave the tape on high for about 10 seconds or so. The heat will help soften the old glue. Then, try peeling the tape off the roll. If it's still stuck, microwave it for another 10 seconds.
I've used this technique perhaps a dozen times or so, and it works on all but the very oldest, driest masking tape.