Need Help

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I\'ve recently bought PI and am looking for a bit of advice. I\'ve used it as instructed by the makers (using 2 drops behind the ears) and as yet have not really had any sniff of attention. Have been reading past post\'s and \"The Scientist\" has advised using one drop - ok this bit is fine, but what I really need to know is where is best to apply this stuff, I\'ve read behind the ears, on the neck in your hair etc and am getting confused images/icons/frown.gif. Also how long does this stuff last and how often should I re-apply it? I\'m going to a club Friday and am worrying it might wear off.

Any help would be much appreciated images/icons/smile.gif