Ugh, acne.. fun times. Have you tried to "squeeze" it..? If all you get is clear liquid it's not ready to be "healed" yet - if you get creamy cheesy looking discharge with or with hair "packets" - then it's time to really hit the road running. My dogs had these problems NONSTOP - my advice here is a bit harsh, but it helped. Squeeze - multiple times a day if you can, get that crap out of there if it's backed up enough to form a "cyst". Soak a cotton ball in rubbing alcohol (isopropyl) and rub it all over the area, 2-3 times a day. It'll kill surface bacteria and stop it from making it worse, plus shrinking the pores to make it more effective to "get the crap out".
If it's bad enough for enough "crap" - you either do it yourself, or the vet lances it and cleans it out. If you're NOT at that stage yet, thank god - religiously clean ALL dishes and air dry or hand dry with clean paper towels - no dishwashers (unless it's metal), the higher temp can make the bowl material "leech" out but that's a very very minor worry.
I used teenager products on my dogs and they worked, FABULOUS. Unfortunately in my experience if your animal is prone to this? They'll develop it in other spots - elbows, in between the toes, etc. Keep a good close eye on it and remember to squeeze when you can, dry out with rubbing alcohol and use vet meds.
In my experience, skin care is like diabetes in that vets don't know a whole hell of a lot.