Greasy water enters through a removable filter basket which captures solids. FOG is extracted from the greasy water periodically throughout the day. Hot water jets push the FOG towards the roller and the FOG is extracted into a disposable container (such as a plastic milk bottle) for removal with rubbish collection.  After the FOG is extracted from the greasy water, the tank is partially drained to help remove residual solids. The hot water jets then clean the sides of the tank. Another hot water jet washes the roller, the blade and the FOG chute. The result is a cleaner appliance, operating continuously with very low maintenance.