What is a wash? Nat February 01, 2020 11:06 Updated Follow A wash is a mix of water, sugar, yeast and nutrients. You ferment this to make an alcoholic base for distilling. Related articles How to Video - Alembic Pot Still - Making the Wash and Preparing the Still Instructions - Air Still Fermentation Kit Why is my wash not clearing? What is fermentation in distilling? What are the heads, hearts and tails in distilling?