The question of tipping comes up a lot with new clients at the salon so I thought I'd address it here to make it less awkward for people who aren't sure.  Most of my colleagues seem to agree that tips are welcome and appreciated.  They are a way of letting us know that you're happy with the service we provide.  So, unless your esthetician or the salon says they have a no-tipping policy, you should feel free to tip your facialist or waxer 15~20% of the service total, just as you would your hair dresser, nail tech, or massage therapist.  I have yet to see anyone, even a salon owner, be offended by a tip.