How Can I Further Prevent Breakouts If Benzoyl Peroxide Helps But Doesn’t Fully Clear My Acne?

Hi I didn’t have acne before I started having acne suddenly when I turned 20 on my forehead cheeks chin I tried several things salicylic acid cleansers etc but nothing worked now it’s been 1.5 years since I got acne I am now using benzoyl peroxide 4% someone recommended I have noticed changed my acne has reduced but sometimes it breakouts again kindly suggest something