I also like my clients to help in the outcome of thier tans, its very important to do your part as well for great results and a longer lasting tan. Like using Dove or commercial soaps will make your tan go away quick and can make it streaky as well :( if you don't exfoliate properly then you can have a spotty tan or one that will only last a few days...not good!
I also always give my clients pointers on how to use tan extenders there is a trick so you don't get weird fade spots after using it. If your one of my clients then you will know my secret!!
On my end I always use the highest quality of solutions available to me and only use them after testing on myself and models if need be. Your skin gets a vitamin infused cocktail while you process, you do NOT get that with cheap solutions...with cheap solutions you get "short tans, dry skin, lizard skin and orangey color.
If you have concerns or questions feel free to drop me a note even if you don't live in the area I'm here to help you get the best possible sunless tan...Period!