Fill a resealable plastic bag with ice cubes. Close the plastic bag and lay it on the gum stuck to your comforter. Leave the ice bag in place for 30 to 60 minutes to harden the gum.
Remove the ice bag. Slide the corner of a plastic scraper under the edge of the hardened gum. Wriggle the scraper back and forth to slowly separate the hardened gum from the fabric. Discard the removed gum.
Spritz the comforter with aerosol petroleum-based pretreatment laundry spray at the site of the gum stain. Allow the pretreatment spray to soak into the gum residue for one minute.
Blot the comforter with a clean cloth to remove the pretreatment spray. Cover the stained fabric with baby powder to absorb the oily residue from the laundry pretreatment. Let the powder sit on the fabric for five minutes before brushing it off.
Dampen a clean cloth with dry cleaning solvent. Sponge the comforter fabric to remove any remaining color or sticky stain from the gum. Move to a clean portion of the cloth as the stain is lifted.
Aid the drying process by pressing a dry cloth into the comforter. Drape the comforter over a drying rack and allow it to air-dry completely.