The first step to cleaning out or flushing TotalBoat Metering Pumps is to pump any remaining resin or hardener from the reservoirs. Denatured alcohol can be used to clean the inside of the reservoirs, but it should not be necessary to run the alcohol through the pump. Once the reservoirs are cleaned, refill the reservoirs and prime the pumps. If there is a different resin/hardener being used, always ensure that the mix ratio on the pump is correct before use.