Critterkill 5g Insect Killer Smoke Bombs will kill bed bugs, moths, fleas, spiders, ants, silverfish and more. They are HSE licensed and approved, meaning they are proven to kill insects. They are easy to use, and a fast and effective way to eradicate pest infestations. Simply light the smoke bomb, leave the fogger to work and return to a pest free environment after a few hours. CritterKill Professional smoke bombs help to control most flying and crawling insects including: Fleas | Bed bugs | Moths | Mosquitoes | House flies | Cluster flies | Cockroaches | Wasps | Silverfish | Ants | Earwigs | & More! Featuring more active ingredient than traditional 3.5g size smoke bombs, our 5 gram smoke bomb provides an effective and affordable pest control solution. Flying insects: Use 1 generator per 161m3. Fleas and bed bugs: Use 1 generator per 40m3. Other crawling insects (such as ants and cockroaches): Use 1 generator per 10m3. How Do I Use CritterKill Smoke Bombs? Prepare the area that is to be treated Open smoke bomb and place on a heat resistant surface Light the fuse and leave the room Leave the room sealed for at least 4 hours (preferably longer) Once treatment is complete thoroughly ventilate the room Further treatment may be necessary Please read provided instructions leaflet prior to using this product.