Uncover your box regularly to let the sun bake it. Can spray a mixture of peppermint oil and water onto the sand and the cover. Mix up the sand and keep spraying, the bugs will come out. Spray once in a while with the peppermint mix. Will also help keep the mold from growing and smelling as well. If you empty your box, spray it with the peppermint before putting sand back in. bugs dont like the peppermint!! Keeps ants from walking over the doorstep into your home too if yo rub the oil directly on the door entrance area!