In the weeks prior to your appointment, it is recommended that you refrain from tweezing or waxing hair that is to be treated by LightSheer. However, the day before your appointment you should shave the target area. This makes it easier for the device to identify and target individual follicles. It's also a good idea to avoid UV rays and even tanning lotion, as darker skin can make it harder for the device to distinguish between hair and skin pigment.