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- 1). Empty all the dishes from the dishwasher. Hand wash the dishes to avoid transferring ants to the counters.
- 2). Divide 1 cup of boric acid powder equally between the soap dispensing reservoirs in the dishwasher door. Close the dishwasher door.
- 3). Set the dishwasher to run on the hottest and longest wash cycle possible. Open the dishwasher to see if any living ants remain. Add another cup of boric acid and cycle the dishwasher a second time if any black ants are found.
- 4). Run the dishwasher empty on a hot rinse cycle with no boric acid or soap inside. The final rinse clears out any remaining residue from the acid and flushes the drain. Now the dishwasher is free of black ants and ready to use again.
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