Before treatment, vacuum thoroughly to remove as much allergenic dust as possible. Shake before use. Turn the spray nozzle to On. Spray evenly on all clean surfaces to be treated. Ventilate well during and after the treatment, allowing the product to dry completely. Repeat the aspiration the days following the treatment to eliminate the dead mites (still allergenic). The product is effective from its application and up to 6 months. For people sensitive to dust mites, the treatment can be repeated every 8 weeks.