Discovering gum on your favorite jeans doesn't mean they are ruined forever. Denim is a sturdy fabric that withstands your attempts to remove gum. The process takes a few minutes before placing the garment in the regular wash cycle. You need an ice cube, a plastic bag, a toothbrush and a dinner knife.
Freeze the gum
Place the ice cube in the plastic bag and seal. Hold the bag against the gum until the gum hardens. For large patches, place the garment in a plastic bag and place it in the freezer for 30 minutes or until the gum is hard.
Scrape away the residue
Place the jeans on a flat surface to work. Use the dull edge of the knife to remove the gum from the fibers. Work with the grain of the denim. Avoid stretching the fibers or scraping so hard you damage the fabric. If the gum becomes too soft to remove, apply the ice to harden it again. Continue until you remove most of the gum.
Apply the detergent
Use the old toothbrush to remove any loose pieces of gum that remain. Dip the toothbrush into the laundry detergent and scrub the denim to pretreat the fibers. Launder the garment as usual.