I am a beginner. I have a wheat beer fermenting in the primary with Safbrew wb-06 yeast. My starting gravity was 1.06. After 5 days there is no fermintation activity. Is it possible the alchol % got to high for this yeast? If the yeast died of to high of alcohol% does it hurt to leave it in the primary for several more days or once the yeast is killed by to high alcohol % is the beer ruined?