All and every spray tan solution on the market contains DHA (click here to read about its safety), which is the ingredient that actually tans the skin. It requires time to develop (how long depends on brand, type, and concentration of DHA). Most tanning solutions will need to be left on between 8-10 hours to develop properly. Getting wet before this, like washing hands, sweating or getting rained on, can remove the tanning solution from those areas and can result in an uneven or blotchy look. Using a rapid, or quick tanning solution does not mean you will tan faster! This is a common misconception. All DHA can actively develop up to 24 hours after it’s application, even if it’s washed off, it can still be working. Tanning solutions that can be washed off quickly will still require 8-10 hours to develop (before you see results). Do not be concerned if you chose a rapid solution, showered and it appears you have no results,  it can take up to a day to show. Usually, these tans are lighter and will also only last a few days.