if you dont have the nozzle round the opposite it way it will go patchy with the bronzer as it doesnt pick up all the solution when you tip it at an angle.
To clean it you just ahve to pump water through thsi one as well, try it and see hwo you get on. if not i have a truespray surplus to...
Also you dont want to buy too much in bulk as the solution is out of date after a year, you alo need to rearch your target audience as well, which age group are you aiming for, how many other tanners in your area, what they use and how much they charge.
Try them both and see how they wear, think what is it your customers want froma tan good colour or lasting tan.
Personaly for me sienna excedes all my expectations, their customer service has been second to none, fixing my machine for me and sending me little things to try on my clients...
i tried to get some of these a couple of years ago i fancied the idea of lots of little fishies nibbling the dead skin cells but couldnt import them let alone use them on customers still think its a great idea and would be very relaxing. they dont eat live skin only dead unlike pihranas lol
i've been tanning for a few years now and new training always helps us learn new techniques which is good.
but to be honest i am so suprised that you haven't had any joy with sienna, i have to say i have always had excellent customer service from them and nothing is too much...