Trap-Cleer from Lenzyme Trap-Cleer is used as a biological grease and sewage-treating agent for industrial, commercial, and municipal installations, including grease traps, wastewater treatment plants, wastewater treatment ponds, lift stations, sewer lines and manholes, and pretreatment facilities. The bacterial cultures are of selected strains ideally suited to thrive in onsite sewage and wastewater management systems. It is approved by the U.S. Department of Agriculture for use in drainlines of official establishments operating under the federal meat, poultry and egg products inspection program. 800-223-3083; www.lenzyme.com.