I dont have a problem selling S.O, because to be honest, I dont give the client a choice!! The daily use of S.O is in the aftercare leaflet, and so I tell them that they need this product. If a client rings to ask how much a new full set is I always say its xx amount, plus xx for the Solar Oil.
I always start talking about S.O and its benefits at the time when I'm filing the new enhancements in, then when I get to applying it myself I show them how much to apply, how to work it into the enhancement, and I tell them the quirky little things about how good it is (some people say it soothes insect bites), and how there;s a hospital somewhere in the USA that uses it on their burns unit! For the rare client who wont buy it, if and when they come back with lifting, I insist that they take the S.O and I charge them to repair any lifting or cracking that they may have, as my clients who use S.O never (or very rarely) get lifting or other service breakdown.
At first I only stocked the pinkie bottles, and they sell fine at £3 each, but recently people have been asking for larger sizes so I'm going to get the next size up in stock and retail it at £6.