Biodiesel after Methanol recovery has impurities such as Soap, Glycerin, FFA, Sulfur, Metals and Moisture depending on the type of process. Jatrodiesel offers a Drywash process (Waterless) that can eliminate all the above impurities to meet the ASTM 6751 including the Cold Soak test. We have installed 8 systems to date. Let us evaluate your product, we can fix it. No need to buy exotic materials or filter cartridges every few loads specifically to fix Cold Soak Filtration issues.