All DE products are actually a mix of the “safe” and “unsafe” types. Food grade DE still has a small amount of “unsafe” DE, and is still dangerous if inhaled in large quantities. DE sold for pest control has to meet specific safety standards and list safe instructions on the label (at least in the US), so this is usually the best choice. Food grade DE may not have a detailed safety label, since it is not intended to be used in pure, dry form, but it is similar to pest-grade DE and the risk of harm is low with the precautions below. [5] X Trustworthy Source National Pesticide Information Center Organization run by Oregon State University providing objective, science-based information about pests and pesticides Go to source

Consider wearing a dust mask or eye protection while you’re applying the DE to avoid breathing it in or getting it into your eyes.

Squeeze bottles or bellows are not recommended, since they cause too much drifting. [8] X Research source

This is especially helpful if you’re dealing with fleas or carpet beetles. [10] X Expert Source Chris ParkerFounder, Parker Eco Pest Control Expert Interview. 18 February 2021.

Carpets are usually only treated on the edges so human activity doesn’t kick the dust into the air (where it’s more likely to make you cough than kill insects). If the carpet is in a side room, you might be able to dust a larger area without any problems.

This won’t stop the insects from reaching the furniture, but it will expose them to DE on the way and (hopefully) kill them a few days later.

Try leaving the DE down for a week, then vacuum it up and repeat the treatment. After about 3 weeks, you should break the cycle of eggs hatching and adults laying more eggs. [14] X Expert Source Chris ParkerFounder, Parker Eco Pest Control Expert Interview. 18 February 2021.

There is no hurry to remove DE from your carpet unless you applied too much (leaving visible piles of dust). Just keep the proper tools in mind so you don’t damage your normal vacuum cleaner during regular carpet cleaning.

It’s best not to leave DE out in households with pets or young kids.