Hair straighteners may kill lice and their eggs if they directly come into contact with the heat produced by it, but it is not a proven method of getting rid of lice. The shell of the nit is just too tough.

Can nits be killed with heat?

For example, hats, scarves, pillow cases, bedding, clothing, and towels worn or used by the infested person in the 2-day period just before treatment is started can be machine washed and dried using the hot water and hot air cycles because lice and eggs are killed by exposure for 5 minutes to temperatures greater than ...

What kills lice and nits instantly?

Spinosad (Natroba).

Spinosad is approved for use with people age 6 months or older. It can be applied to dry hair and rinsed with warm water after 10 minutes. It kills lice and nits and usually doesn't need repeated treatment.