Controlice Non-toxic, non-resistant lotion to combat head lice Non-toxic, non-resistant lotion to combat head lice infestations Controlice Head Rinse lotion employs the assistance of the active Dimeticone to wrap lice up. As a result they can't move and they can't function. It is like putting them in cling wrap straight jacket and leaving them to die! The great thing is that the formula contains no potentially harmful poison and the actives are not absorbed through the skin. Because Controlice Head Rinse lotion does not work chemically, lice can also not become resistant to it. Resistance is an ever growing problem with insecticide based formulas. Controlice Head Rinse lotion is easy to use. As a matter of fact, users will hardly notice the colourless and odourless lotion when they leave it on overnight. And there is more than enough in a bottle to repeat the treatment within the prescribed seven day period.