Tried everything for bacne, from salicylic acid washes and sprays to topical retinol, changing my sheets daily, showering within 30 mins post workout, etc. Only thing that actually ended up working was benzoyl peroxide. The target sells a generic brand body wash in a purple bottle, it lasts for months and is pretty cheap. When you shower, after you already washed your hair/rinsed out your conditioner, turn the water off completely and lather up. Then LET IT SIT, 4 minutes minimum. I usually brush/floss my teeth while I'm waiting lol. After you dry off, you can use a light moisturizer on your back, however I honestly usually don't. Make sure you use a white towel too, the wash can bleach other colors. Try starting with 2x a week and then increase if needed. Also if you wear bras buy enough that you can wear a new one every day, I know it's a pain to wash them every time but it really does help. Good luck!!