Why not have a mob roaming around collecting trash from the floors at banks etc? On other shard the staff placed 'a garbage man' at every town bank, where he would roam around in patterns and 'scavenge' trash left on the floor, and sending them into the ether. It worked perfectly. I'm wondering if the devs have thought about this before?
Very often and for thousands of years this garbage was a sweetness for beginners who, having picked it up with burning eyes, run to the cemetery and chop up skeletons! I was one of those newbies in my early childhood ...