How to get rid of Comedones / Acne?

Comedones are a nightmare for anyone. These little acne bombs are the notorious kind. My comedones occur on the T-zone with an extreme outbreak on the chin, and forehead. I have sensitive combination skin and I was using products meant for that. After having a slight breakout of acne caused by my mobile phone on the right-hand side cheek area, I included Mandelic acid into my routine, this was 5