One way to get Silly Putty out of clothes involves scraping it off with a butter knife, soaking the spot in WD-40, and then wiping the stain with rubbing alcohol and dish soap. If the Silly Putty hasn't become too ingrained in the fabric yet, turning the piece of clothing upside down over a bowl until the Silly Putty falls off is another option.
To remove Silly Putty from clothes, first scrape the excess putty off the fabric with a butter knife or spoon. Next, spray WD-40 on the spot and let it soak in for several minutes. Use the knife or spoon again to scrape more excess Silly Putty off the garment, then apply more WD-40 and wipe it off with a cotton ball or swab.
If there is still Silly Putty on the clothing after doing these steps, soak a cotton swab in rubbing alcohol and blot the stain thoroughly, then rinse and wipe away any remaining putty. Finally, moisten a sponge or cloth and pour liquid dish soap on it, then wipe the stain once more.
Another way to remove Silly Putty from clothes is to freeze it off. Put an ice cube in a plastic bag, hold the bag over the Silly Putty until it is frozen, then scrape it off with a butter knife.