How do you kill wool worms in sweaters?

To kill wool worms in sweaters, first, place the affected items in a freezer for at least 72 hours to eliminate any larvae or eggs. After freezing, wash the sweaters in hot water, if the care label allows, or steam them to kill any remaining pests. Additionally, store wool garments in airtight containers with cedar blocks or lavender sachets, which repel moths and help prevent future infestations. Regularly inspect and clean your wool items to keep them pest-free.