Head lice can be very difficult to treat especially when children are at risk of re-infection. It certainly is very likely that there are children at the day care who still have head lice and are re-infecting your children. You need to discuss this with the school and they really need to take this seriously. Unfortunately, sometimes the safer treatments such as tea tree oil may lose its effect. You should discuss alternative one off treatments with your pharmacist. It is always absolutely vital to follow the instructions for this kind of treatment to the letter.
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