I'm considering buying bulk dme but I have a few questions.how long is the recommed shelf life?Is the only difference between dme and lme the. % of moisture. I'm going to be growing my own hops and have read all the threads on washing yeast. The dme along with gowing hops and washing yeast just seams like a great way to keep the price down.So I guess what I'm asking is why don`t everyone do this??