The reasons for this happening are several and should be considered when getting a sunless tan from a salon or mobile service.
1. How much is applied to your skin~ To much DHA on anyone's skin can turn it orange because the skin can only absorb so much of what is put on it. So for those booth's or Technicians that spray heavy beware that it may happen especially if your fair.
2. Old solution~ some companies buy in BIG bulk to save $$ on S/H and the overall cost of the solution. Well unless your spraying hundreds of clients in a week or more then the solution will get old. Proper storage is a must as well, I use Organic & Natural solutions so I store mine in the fridge since they don't have Parabens to give them extra shelf life.
3. Using to high % of DHA~ For most clients they want realistic results that look pretty and will fade good too. When you are sprayed with a higher % of DHA than you really should be the possibilities of you turning Orange go WAY up. So if you tell the Tech make me as dark as you can and your fair and burn easily...and they LISTEN to you, you most likely will be orange.
So keep that in mind when you schedule a session with anyone, ask a few questions about how its applied and how fresh the solutions are and finally how much experience the Tech has...check out reviews first is a good thing!