Few years ago a friend brought me back some green beans from his trip up the blue mountain in Jamaica. I roasted them and it was like drinking fine silk! Unbelievably excellent!! He went back this past February & brought me back some more, from the same farm, and not so good! When I roast them there is also a pale streak down the middle underside of the bean. The bean looks normal before roasting, and I've tried different roasting times...strange! anyone have an idea?