Raid Fumigator Triple Raid Fumigator works just like Raid"s popular foggers, only this one leaves behind a fresh scent! Simply prepare area you would like to fog out (close all windows and doors, take all pets including fish out of the area, make sure flames and pilot lights are out), set fumigator in place and leave area. Area should be safe to return to in approximately 3 hours, upon return make sure all windows and doors are open and wait another 30 mins before actually occupying the room again.