Do use the correct detergent for your dishwasher. Check if the detergent contains a rinse agent. If not, you may want to add one.
Finally, check the seals around the dishwasher for cracks or leaks, and clean under the trap in the bottom from time to time. You may be shocked at what you find! – Heloise
Secure or hold the bag closed tightly and shake it hard for about 30 seconds. To avoid making a mess inside the house, do this outside.
Once you are done shaking, remove the feather duster from the bag and shake it until all of the cornstarch has been removed. Clean your duster periodically, as often as you think is needed. Happy cleaning!