i had a horrible experience with fake tan, it said that it come into full effect after 3 hours (on the bottle) but the next day i had a very streaky orange tan.

what i did was hop into the shower and wash yourself as normal, the i exfoliated and scrubbed myself down with bicsarbonate of soda.
then i repeated this process.
then i got WHITENING toothpaste and an old toothbrush and scrubbed myself down with that (sounds wierd i know, but it works!)
then give yourself another wash down with shower gel/body wash.
when you are finnished lather yourself with moisturiser!! all that scrubbing isnt very good for your skin (it removes the moisture)

for my feet i soaked them in warm, soapy water to make my skin soak in the moisture, and then i used a foot-file to take off the hard, dry skin, which removes the fake tan.

it doesnt completly remove the fake tan in one go, but it fades it, and after a couple of times doing this it should fade almost completly. but dont worry if it doesnt, it fades with washing anyway.