Hot Tub Things Jet Line Cleaner 16 Ounce - Clears Spa Plumbing of Organics, Oils, Dirt, and Minerals Jet Line Cleaner clears spa and jetted bath tub plumbing of organics, oils, dirt, and minerals! America's #1 Trusted Brand of Hot Tub Chemicals Safety Tested to Assure Quality, Guaranteed Performance Formulated Exclusively for Hot Tubs And Made from the Purest Chemicals Available Compare to Leisure Time Jet Line Remove filter cartridge and clean separately using Filter Cleaner. Before spa is drained, add entire bottle of Jet Line Cleaner to warm spa water through the skimmers. Turn pump ON and run the jets for 15 minutes. (Ensure that filter is not in spa.) Turn pump and jets OFF and let sit for 1 hour. Turn pump ON and run jets and blower for 15 minutes. Drain the spa, hosing off the inside spa walls while draining. When empty, rinse one last time. Refill the spa according to the manufacturers recommendations.