bug repellent for hair?

hello everybody! have Any ideas? I use tea tree in my shampoo but don't think it works to well. I have this spray bottle i put like 5 or 6 drops, it holds about 3 cups of water. Is it ok to leave it in without washing it out? thought id just spray b4 i go out side. any other oils i should get?THANKS
updated by @l-ray-sepulvado: 01/13/15 08:43:19PM

teatree works great...for lice for ticks i thinkeucoliptus or citronela for mosquitos and fliesneem seed oil has a strong earthy smell i dont mind 1 bit but some pp will think it stinks but thats realllly strong against anything parasitic i think overuse might cause headaches tho but unconfirmed only heard that from 1 soursebelieve oy or not that skin so soft hand stuff repels many bugs like mosquitosdunno how good or bad it is fir locks tho


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