If you've ever wondered why your armpits turn green after a spray tan I've found the culprit. It's your deodorant. Or to be more specific, your anti-perspirant. The green color is a reaction between the aluminum in the deoderant and the bronzer from the spray tan. It is only temporary and will wash off with your first shower. To keep this from happening you should always wash your armpits with a washcloth and soap really well prior to getting a tan. Make sure you do not apply deoderant before the spray tan. After the airbrush tan you may dab the armpits with baby powder and a dry sponge and then apply your deodorant 5 minutes later. I have also noticed that Secret deoderant will always turn the armpits green even if applied after a spray tan. Lady Speed stick does not do this.