I have two bottle of Watson Brand Test that have been sitting in a box in my closet for almost a year. They expiration on them was 9/08. Are these still good. I've used this stuff before along with other tests and this stuff is the shit. Should I be worried about the exp? It's only been a few months. How long do you think it will be good for? thanks. It's American Human grade so I am not very worried about it but thought I'd ask you guys.