This problem was the bane of my life. Products for frizzy hair helped. I found organix kakui oil shampoo and conditioner to be good. Anything by kerastase made it way worse. The root of the problem, it turns out, was the hair colour I was using. Loreal changed their formula around the same time the static started. I switched to a salon that uses wella and the problem disappeared. Do you colour your hair?
I second the cheapo colourant theory. My hair is fine anyway, used a Superdrug colour last week instead of my usual Clairol/L'Oréal and it has been falling out and is super static. Very disappointed as I usually like Superdrug!