Lines should be cleaned regularly. Lines do get dirty and contaminated with chemicals and grit. They can be laid out and hosed down with clean, freshwater. If they are stained with dirt or mildew, there is a way to clean lines in a washing machine. First, coil the line carefully in neat coils about 15 inches in diameter. Next, tie the coils securely together at 0°, 90°, 180°, and 270° with several turns of small stuff (heavy string or twine) securely knotted. Set the washing machine on a medium agitation cycle with warm (not hot) water and use laundry soap with no bleach. Don’t place the coil over the center agitator in the washing machine. Afterward, cut the small stuff off and hang the clean line to air dry.