1.Powerful dishwasher balls replace the need for dishwasher powder / detergent / tablets. When using Dishwasher balls it is recommended to use rinse-aid as you would usually do in your dishwasher to maximise effectiveness 2. We suggest to place 1 or 2 dishwasher balls (depending on soiling of crockery, 1 for light soiling, 2 for heavy soiling) on either the upper shelf or in the cutlery rack of the dishwasher. 3. Run the dishwasher cycle as normal. 4. Each dishwasher ball (Net weight 100g) is effective for approximately 60 washes (Net weight 45g for approximately 20washes) With use the pellets within the ball will dissolve and become smaller. Dispose of used balls in refuse.