Yes, but how much? It's kinda complicated. How much do you need to clear your wash based on your still? Different stills are going to get away with different things. If you want the "easy" answer. Follow these guidelines. They will work for almost all stills: 1 - Make sure fermentation is finished then wait a few more days 2 - Rack/syphon off the top of the fermenter avoiding the yeast cake 3 - Don't let any bits of grain into the pot 4 - Don't stress if the wash is a little murky 5 - Don't let the wash sit in the pot for a long period of time before distilling