When the probe is inserted into the hair follicle, the probe stops at the hair bulb. The hair bulb is not always sitting at the bottom of the hair follicle. The hair goes through a shedding and replacing cycle. Therefore, the hair bulb moves up the follicle as it goes through its shedding cycle.
If the hair bulb is half way up the follicle when the probe is inserted, then that is where the probe will stop and the electricity will not reach the base of the follicle where it’s needed to coagulate the growing cells that feed the hair.
Since the growing cycle takes a minimum of ten days, treatments should be repeated every ten to fourteen days in order to treat the hair when its bulb is at the base of the follicle. Although there is always a percentage of hair removed permanently with each treatment, a larger percentage will be removed if treatments are done on a regular basis.