I've just seen this post on FB which reminded me that I'm never sure what to do with plates after a meal.
I would naturally stack everything like the right hand photo, but always worry that this is more annoying than helpful for waiting staff for some reason.
I wipe up any obvious crumbs, but worry that staff then can't tell that it needs wiping if it's not obviously dirty!
Are there any waiting staff on here who can confirm what us customers should do to make their jobs easier?