Can head lice become resistant to a lice treatment?

Lyclear products do not contain any chemicals, but have a purely mechanical mode of action; therefore head lice cannot develop resistance to any of its ingredients. There is a possibility that head lice may become resistant to ingredients of insecticide-based products. However, true resistance to insecticides is relatively uncommon. Other reasons much more likely to be responsible for apparent treatment failure:

  • a bad diagnosis
  • failure to follow instructions: not enough product, treatment duration is too short, lack of head lice and eggs removal by combing, etc.
  • (re)-infestation by untreated school friends, family members including adults
  • no cleaning and disinfection of the environment
  • no check 7 days after the first treatment and repeated treatment if necessary