★★★★★
For head lice I use vodka. Any 40 percent alcohol is good. Put on head wrap scalp in plastic bag. Leaving no room for air in or out. They get killed by the alcohol fumes. Wait 40 minutes. Wash off.
This kills lice, not their eggs, so repeat in 1 week to kill the lice that will have hatched out.
I'm happy to treat with non toxic things for my girls. Lice free house. Works without fail.