have any studies been done on the effects of humidity and clusters. been real humid here in south florida and i've been having shadows all day with two or three kip 8 headaches per day. seems after it rains and becomes less humid my head feels normal again ;D (well as normal as it can be). also, i am booked for chicago and looking forward to meeting you all. see you there. are the bears playing at home that sunday? 8-)