Don't forget to clean your hair brush too! and your partner may need to be checked out as well. It is just so common, they are a plague, and this wont be the first time babe!
Tea tree oil is supposed to be good, so maybe a small amount in your conditioner as well whilst combing. It is natural and they hate it too. Apparently "wild child" is supposed to be pesticide free, but I haven't used it personally I only spoke with my friend about it.

Good luck hun, you are definitely not alone on this one