Hatchwell Canovel Home Blitz! - Home Fumigation Twin Pack, Plus 400ml SprayHatchwells Canovel Home Blitz! Fumigation Twin Pack is a simple and highly effecive way of killing Fleas, Flea larvae, House Dust Mites and other insect from your home. Comes with free advice leaflet on effective flea and house dust mite control. The Home Blitz Plus Spray is a 400ml aerosol, and a great way of topping up your protection to suspected affected areas. It's a simple and highly effective way of killing fleas, flea larvae, house dust mites and other insects in your home. Read more… Each treatment lasts for up to 6 months.