hi
i'm a spray tanner. what products did the salon use? was it an actual therapist doing the tan or a booth?
i've found from using booths a couple of times in the past that the first time i got a good tan then a few weeks later the prices were halved and i was sure the solution must have been watered down as it wasn't as good as when i paid full price
you might be better getting a darker solution next time. different products have different strengths or just pale, original or dark.
also, if you have products on e.g deoderant, body lotion etc this can affect the tan
spray tans tent to last for 3-5 days and a lotion tan will last longer
you can also buy products that can help maintain the tan.
how long did you have after the tan was applied did you wash?
i work with fake bake and i know that they don't do testing into products that fade the tan but they have had comments from people saying that Dove seems to strip the tan
it might just be that the products used on you are not for you. you should mayby see if the salon stocks 2 types of tans (some do) if not it would be worth trying out another salon rather than using sunbeds