While this may be acne, perhaps the cause is not clogged pores. My children used to get what looked like acne, but it was really an allergic reaction.
My children were allergic to Ranch dressing when it touched their faces. A friend's child was allergic to catsup when it touched the face.
Perhaps try putting a little hydrocortizone ointment on the area and see if that makes a difference.
Additionally, I also have extremely sensitive skin. The only cleanser I have found gentle enough for my skin, not make me break out or dry out my skin is by Neutrogena Pore Cleanser. See link for a picture of the bottle. I use it to wash my face but also apply to other areas like the shoulder or chest if I have the beginning of a breakout. It's a very thin non-soap formula.
http://cgi.ebay.com/PORE-REFINING-Cleanser-6-7-Neutrogena...