Engine hunting

What is your question?

my 2011 Subaru Forester started hunting at idle after it idles down after warm up and keeps hunting all day. Did the idle re learn, changed MAF. Couldn't find any vacuum leaks. Fluctuates from 600rpm-900rpm. When using cheap scanner I can see timing advance change and fuel trim change when this is happening.

What makes this problem better or worse?

Spray a little carb clean in intake makes it go away

How long has your 2011 Subaru Forester had this problem?

A few weeks