Power Clean is a big bloatware app in itself, you should consider something else (if at all) It will constantly fire up messages about how your phone is slowing down, filling up, at risk and heating up and I am certain most of it is inflated or simply just not true! They (and similar utlities) encourage people to keep interacting with the app which provides them with revenue. I don't think you should worry until the surfaces of the phone are too hot to touch.