Hey Susie, we make sure to rinse the brewer and frame tubing out as thoroughly as possible after every application. When we get ready to “brew” every new batch, we fill up the container with regular chlorinated water from the hose and run with the air pump circulating for 24-48 hours before adding the compost in order to: 1) make sure the water becomes de-chlorinated prior to brewing and, 2) help clean/rinse out the frame and pump tubing. Hope that helps. Good luck!