No matter why you use duct tape on the carpet it s important to pull it off as soon as its purpose has been accomplished.
Remove duct tape from carpet.
I successfully used de solv it to remove about 35 short strips of black cloth duct tape from industrial gray black patterned carpet tiles that were being used for a chair layout in an auditorium.
Next dab the wd 40 onto the remaining adhesive.
Doublesided carpet tape is a very sticky tape that is reinforced with threads to help hold the adhesive in place between the carpet and the subfloor.
Poured it on an old rag and then rubbed it in a circular motion.
Finally apply a carpet cleaner such as goo gone to finish the clean up.
Let it set on the carpet for 15 minutes.
I had two way tape going around the edges of a small area rug to hold it in place on the wall to wall carpet.
The longer you leave it the more likely it is that the adhesive will dry out and stick to the carpet.
Even if the latex based adhesive is moist and flexible when you pull off the tape it won t stay that way for long.
First scrape the carpet with a plastic knife or paint scraper to remove as much tape as possible.
Then scrape the carpet again to remove as much of the adhesive as possible.
After reading the comments i tried the rubbing alcohol 70 trick.
It took about 90 minutes.
Warm water can often effectively remove duct tape residue from glass vinyl linoleum and other surfaces that have a high gloss finish.
Confirmation of a great tip.
All up i used about 130 ml of solvent from a 300 ml spray bottle.