It is not healthy to leave your make up on when you are sleeping. If you do not completely remove it well, it can attract dirt, clog pores, cause break out, sometimes an eye infection too. As for me, I always remove it well before I get a good night sleep. It is important how you remove your eye-make up. I bought the eye make up remover from Bobbi Brown, I thought it removed my eye make up really well. This remover is for all skin type , it removes make up from the eye area without any oily residue. After removing, I feel clean, and refreshed. I’d wash my face with my facial cleanser again to prevent any break out.