Having suffered from acne myself, I know it is all too easy to dry out your skin.  I lived in the Midwest where it was very humid and hot-which increased my oil production.  During my teenage years, I would use rubbing alcohol twice a day as a toner trying to get rid of the excess oil. 

Now that I understand how the skin works, I realize why this was only making the situation worse rather than better.  If you dry out the surface of the skin, your oil production goes into overdrive.  Because the surface cells are dry, like tissue paper, your pores can be blocked by those cells.  This traps the oil being produced with an end result of even more clogged pores. 

It is important to use skin care products made for your skin type.  If the products you are using leave your skin feeling tight or irritated, they are too harsh for you.   If you find periodically that your skin is a little crepey or flaky, use a 10%  strength alpha hydroxy (glycolic) acid once a week to gently exfoliate so your pores will not be blocked.