Sleeping with it is completely terrible as it sticks under the arms and behind the knees, totally awful. Additionally, it gets patchy and turns completely orange on dry areas like hands, for example. It doesn't transfer to fabric and doesn't smell that bad otherwise.
I exfoliate too, put some cream on my elbows and knees, and apply it all over my body with a glove, then sit on the edge of a chair, without clothes, and let everything dry for about an hour. The color becomes beautiful quickly, and after just one application, I have a color that lasts over a week, and the next week, fourteen days, it gradually and evenly washes off if I don’t apply more. May I suggest that you maybe don’t sleep with it on? I apply a good amount of a thin moisturizer a few hours before bedtime after the sun-kissed color has dried. Hugs from Trønder