hello, I'm just curious as I've seen a prep spray on the Suntana website, I'm thinking of buying it as it's not too expensive, but how exactly is it used? Is it sprayed on & left or sprayed on & wiped off? what exactly is prep sprays purpose? do you find a prep spray makes the outcome of the tan look better? & is it worth buying? sorry if any of these questions sound daft but im unsure of how & why it is used, there aren't any instructions of use on the Suntana website so thought I'd post it on here, thanks x