Salicylic acid can be applied morning or night every single day. If you’re acne-prone, look for a salicylic acid cleanser such as Keep the Peace Acne-Calming Cream Cleanser to wash away oil and bacteria from the skin. Because this ingredient is technically an exfoliant, salicylic acid can cause irritation or dryness when layered with other skincare like acids (like AHAs), vitamin C, or retinol. If you have sensitive skin, use these active ingredients during separate routines.