Dishwasher Magic safely and effectively removes lime scale, iron, soap scum, and grease left behind in your dishwasher. Is also a limited disinfectant against gram-negative bacteria such as Eschericha coli (ATCC 11229) and Salmonella Choleraesus (ATCC 10708). Improves cleaning performance and extends the life of your dishwasher. Safe for plumbing and septic systems and all model interiors. Use once a month to ensure optimal cleaning and prevent build-up.