As long as you applied the product according to the label directions, everything it came into full contact with should be dead. There are a number of reasons you could still be feeling itchy:

1. You've treated with more than one treatment before using Licefreee. Repeated treatments can cause the scalp to dry out and feel itchy.
2. The active ingredient in Licefreee is salt, therefore it is possible that it can dry the scalp a bit.
3. The itching could be caused by the healing process of the areas where the lice have bitten your scalp.

Remember, itchy doesn't necessarily mean you have an active infestation. Keep an eye out for live lice post-treatment, if you don't see any there is no need to treat again.