Selenite is a white or clear stone known for its powerful healing and energizing properties. It's actually one of the few crystals believed to be able to cleanse other crystals and is named after the Ancient Greek moon goddess Selene, thus associating it with lunar cycles and the divine feminine.
Selenite is not only a useful tool for spiritual cleansing, but it can also provide the user with a greater sense of protection and clarity. It can be particularly helpful when you just feel stuck or tired for no reason.
In terms of how to best use your wand, there is no right or wrong way. Try waving it in a room of your home or just displaying it by the threshold. It can help balance out the energy of your entire house. Just be careful not to get it wet as this can injure your wand.