Nevertheless, I would still say the best solution to whatever problems you are having with lice would be to receive official treatment and advice from your doctor. This is because they can advise you as to which lice killing product is best to buy to get the job done safely and properly.
Although the idea of using a home remedy may be far more attractive, especially in terms of the cost, I know I would prefer to be sure that the product I am using is getting the job done correctly and safely.
There are numerous lice treatments and ointments available on the market and some of them are probably cheaper than you might think. Paying a visit to you doctor or another medical professional can help you find out what the best choice of ointment is for the people you know who are affected by lice and the eggs.
A lot of the modern treatments are guaranteed not only to kill the lice that are currently living on the scalp, but also whatever eggs that have be deposited on the head also. This will completely eliminate the infestation of lice from the head and hopefully give you a peace of mind knowing that the problem has been taken care of.
Of course, it may be worth a try to use washing up liquid if you are certain that it will not provoke any allergic reactions or other such side effects. But my advice would be to consult the professionals and go with a remedy that has been scientifically proven to work in order to get the best results.