I am new to making wine and the POMEGRANATE WILDBERRY ZINFANDEL kit is what was recomended to me by my local brew shop,My question is the instructions say to leave it in the primary fermenter for approx. 14 days until i get a S.G of 0.998 or lower,i am at day day 6 and am starting to get Anxious to check it so should i wait until day 14 before testing it and also how do i take a S.G without running the risk of getting outside contaminates into it?