Before settling down to sleep, give your pillow a firm rub to activate the vapour release. The pillowcase is treated on both sides, If you find your pillowcase is not releasing, turn your pillow over to activate the other side. Breaze motion sensitive pillowcases are designed for a single use period of up to 14 nights. After this period, most of the motion sensitive capsules will have been depleted and you should replace with a fresh Breaze pillowcase.