It's not external! It's internal!! The skin is the largest organ and it needs to be nourished from inside. The wash/lotion cycle can be drying her out, and while a little gentle scrubbing with a washcloth can remove the dead skin from the surface, which helps prevent SOME clogging, the bulk of the problem is her hormonal changes. My son's problems didn't start in 5th grade, but he's been remarkably blemish-free since things started up for him in high school.
It's not what she's eating or what she's touching her face with, unless she is squeezing her pimples which will make things much worse. So don't let her believe all the stuff about chocolate and fries. You can spend a fortune on lotions and creams, both over the counter and prescription, but it's not going to help the underlying problem.
Someone mentioned genetics - yes, that can be a factor, but there is a lot of new info on epigenetics, which is repairing those genetic flaws by getting the genes to return to their proper "switching" (which genes flip on, which flip off), and those signals are disrupted by environmental influences, toxins, stuff in our food supply and more. So there is a lot she (and all of us) can do to rectify that. I can send you some info if you want to learn more. People think we're stuck with our bad genes - but we aren't. Bad genes aren't bad - they are just improperly functioning, and there are natural ways to address that, safely.