XEN-TAN Dark Lotion Weekly Self-tan... So after sun-worshipping and fake-baking I have realized I'm not helping my aging gracefully process and gone in search of a self-tanner. It's been a stanky experiment (I tried Hempz daily lotion...aka stank like self-tanner everyday) but finally found this awesome product. Put this stuff on for 4 hours then take a shower...yes it stanks, but not until hour 3. No streaks, perfectly even golden bronze tan. Use every week.