want to pay 10 $ for salt water spray ? Licefree Spray Instant Head Lice Treatment - 6 Fl Oz

 states it's ingredients are

Active ingredients

Natrum Muriaticum 2X (Sodium Chloride, USP).

Purpose

Purpose: Pediculicide.

Uses

For the treatment of head lice; pubic (crab) lice; body lice.

Warnings

Ask a doctor before use if

Ask a doctor before use if you have infestation of eyebrows or eyelashes.

Stop use and ask a doctor if

skin irritation or infection is present or develops.