Head lice are a common problem that can be difficult to get rid of. However, there are some treatments that can kill them instantly. One of the most popular and effective methods is using chemical-based shampoos or creams specifically designed for killing head lice. These products usually contain insecticides or other toxic chemicals which work by dehydrating the lice and causing them to die within minutes of contact with the treatment. Additionally, some products may also include special ingredients such as tea tree oil or eucalyptus which help make the process more efficient by repelling existing lice while simultaneously killing eggs and larvae on contact. Another option is a hot air device like AirAllé which kills both adult lice and their eggs in one session without any harsh chemicals involved. This method involves passing heated air through your hair at a specific temperature for about 25 minutes, during which time it will effectively cook all living parasites present in your scalp, leaving you free from infestation!