DE does not kill them by being eaten. It is a silica compound that absorbs moisture like silica gel pellets. When the bedbugs walk through the powder, it attaches itself to their bodies and kills them by literally drying them out. It should also be placed along the baseboards at the floor along the wall where the beds are located because they hide in the walls during the day and come out at night. They also hide in the bedframe that supports the box spring. Putting the powder all around in there will kill those as well.
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