My laser technician requests that you shave before coming for the treatment. The laser finds the hair. I dont know how but it does. The shorter (shaved) the hair the better the treatment. Any hair that you may missed while shaving will be found when the laser hits it. Its like catching hair on fire. The smell is even of burning hair.
Some interesting but varied understandings of 'best' requirements prior to laser treatment. Personally I was told that some reasonable hair length was required, ie, 3 -4 mm, and that the skin wasn't recently, freshly tanned?! ......which I have to say put me off the idea, as I love to keep my tan topped up and dislike even having any hair showing....... Obviously if done well, then laser treatment has the wonderful benefit of being more permanent....however not liking the thought of letting hair growth and keeping out of the sun.....I have stuck with weekly shaves and maybe bi monthly depilation foam on my back...... which works for me albeit far from ideal and I certainly wouldn't discount laser treatment at some point in time....to which these winter months would seem ideal, at least based on what I was told.