Ooh a tricky one.
All three of mine were quite 'ocd' before teen years - now they are just filthy mingers really. I go in with a shovel, gloves and a bin bag every half term.
Even the one I deem to be 'clean' - well I oiked out 56 pair of socks (I'm not kidding) and I dont even want to think about the underpants he lost 3 years ago. Nor the volume of packed lunches that disappeared.
Before anyone cries "dirty, slovenly bitch" at me - he had a cabin bed against the wall so its only something you move when decorating. What was behind it was the stuff of FB photos 
56 pair of socks. Still reeling from that. And the yogurts.
We are in the middle of decorating upstairs. It hasn't been an experience I wish to repeat.
i have one laundry basket which I expect them to put thier stuff in. In reality it never quite makes it that far.
They will be having their own laundry bins in their bedroom.
I do go in every day and fling the windows open because teenagers reek of musk and sweat and other bodily functions I dare not swell on. I also air the duvets over the bannisters and give them a quick squirt daily because even the fresly showered teenager can reek over night. I wash the duvets themselves every month to remove the smell of rotting corpse.
This is from bedrooms that dont have consoles, PCs or laptops, only a TV and are barely used for anything other than sleeping in.
Yup, I conclude, teenagers are indeed mingers.