Hi, Courteney. There are 2 types of comedones. Blackheads - in which the "plug" is exposed to the air and whiteheads in which the dry sebum plug is not exposed to the air.
Steaming will help only in the first case = blackheads. For whiteheads, you need to consider creams with salicylic acid or glycolic acid. Look in your personal plan for suggestions. 🙂