Can putting stuff toys outside in 15 degree weather kill head lice?

Putting stuffed toys outside in 15-degree weather will not kill head lice. Head lice require a specific temperature range of 98.6°F to 102.2°F to survive and reproduce. Exposing stuffed toys to cold weather will not reach the necessary temperatures to kill lice and eggs. The most effective way to eliminate head lice is by treating the scalp and hair using recommended lice shampoos, conditioners, and combs according to the instructions provided or following the advice of a healthcare professional.

For best results and complete lice removal, it's recommended to follow a comprehensive treatment protocol that includes the proper use of lice treatment products, frequent laundering and sanitization of bedding, clothing, and other items, as well as thorough combing of the hair to remove any remaining nits (eggs).