Now that I’m on my second bottle I can say this is truly my new fave sunless tanner! I leave on longer (typically an hour) for a darker tan, but I’ve slept in it too. The key is to ONLY RINSE WITH WATER! Don’t use soap when washing off the color guide and don’t use body lotion after! It allows the tan to reach full potential! LTKBeauty LTKSeasonal LTKgrwm