Automatic Trash is a utility that will stay next to the clock and will search for files that can go to the trash.
Following rules that are pre-set by the user, it will prevent having directories full of useless items.
If you don't thrust your rules you can always forward the items to a folder and check them later.
Although there are settings for periodic cleaning of the trash, by life time and / or space occupied.
Keep your mac clean. Use the Automatic Trash.