Sorry to say there is no Instant Clean -button on CA PPM. The maintenance is hard work for the admin, but somebody has got to do it.
Aurora has recently posted some details on housekeeping
CA PPM Application Housekeeping
I say recently, because that was an active topic some 15 years ago when the systems did not yet need that much maintenance as they where still gathering junk. Most of the discussions from that time are now unaccessible.
One of them was in Clarity User Society (1000+) in LinkedIn just ten years ago. That is attached in non-edited form.