It is best to apply pesticide when Earwigs are young. The best time can vary from year to year, but is usually in June and occasionally July. It is essential to wait for the pests to appear before starting treatment, since insecticides are not a prevention method. Timely application prevents the formation of a second generation. There are good outdoor treatments available for controlling Earwigs. We suggest a natural treatment of organic insecticide soap diluted in water and applied late in the day wherever Earwigs hide along foundations; in wall cracks, aluminum door tracks, and gardens; on sidewalks, fences, stacked wood, tree trunks, tree forks, and asphalt surfaces; under shrubs and outdoor mats; and around outdoor furnishings (picnic tables, swings, patio chairs, etc.), swimming pools (in-ground or above), and sheds. The soap will have no aftereffect, but it is important to make contact with the insects for it to work. For a total spray effect, use a garden sprayer or a compressed air sprayer.
Finish the job with Maheu&Maheu Insecticide Dust
once the surfaces have dried (e.g., the next morning). The dust, given its long term action, will eliminate any Earwigs that "escaped the shower" of insecticide soap.
Inside, it is often enough to spray door and window frames with Maheu&Maheu Crawling Insect Killer
to eliminate attempted intruders into the house. Those that do manage to get in will be unable to reproduce once there.