If you put the fabric on top of the bag rather than in it, make sure there’s enough room in the freezer so that the clothing isn’t touching anything in there except the plastic bag it’s sitting on. Try to limit cross-contamination.
If the gum does thaw out before you get it all off, freeze the garment again or use an ice cube (see Tips below).
There is a product called Goo Gone that also works very well and washes easily out of clothing. You can get it at most grocery, drug, or department stores, or online.
Lanacane contains Ethanol, Isobutane, Glycol, and Acetate. This group of chemicals speeds up the release of the gum.
Turn the item back over, and you should be able to easily scrape away the gum. Use a little more to finish the job, then rinse thoroughly before you launder it or clean as usual. Neither home nor commercial washers and (especially) dryers are intended to dispose of flammable liquids.
