Q. We are lice-free at last with Listerine, alcohol, vinegar and Denorex! We sprayed four heads every night with Listerine before bed, then combed and combed every inch with a nit comb.
The lice were gone in 3 days, but we continued this ritual for 7 more days to kill off any newly hatched eggs each day. I soaked the four separate nit combs in rubbing alcohol between uses and dipped them periodically in the alcohol as I combed.
We also used vinegar on one severely affected head to loosen the nits. Then we shampooed the hair with extra strength Denorex. Sure, it was labor intensive, but it was also cheap, safe and effective.
A. We suspect that the alcohol in old-fashioned amber Listerine kills lice. We would discourage spraying it on, though, as the fumes might be inhaled. Gently massaging the mouthwash into the hair and covering for a few minutes with a towel should do the trick.
Combing out nits is laborious but essential for permanent success. Vinegar helps loosen the glue that holds lice eggs (nits) to the hair shaft.