Many people successfully use diatomaceous earth (DE) for getting rid of unwanted pests like bed bugs, cockroaches, fleas, and more. After the diatomaceous earth has completed the job and served its purpose, homeowners often wonder how to clean it up. First, clean up may not actually be necessary, as many people will leave diatomaceous earth in and around their homes for indefinite amounts of time. Diatomaceous earth will continue to be effective as long as it remains dry. Leaving it alone works best when it is used in inconspicuous, out of the way areas like wall voids, crawl spaces, behind baseboards, and inside cupboards. In areas that you would like to clean up, try some of the following tips: Before starting to clean, remember that although DE is considered safe to use around pets and humans, like any other dust, it may be irritating to eyes and lungs in large amounts. Many people suggest wearing a mask and glasses when cleaning up for this reason.