D.C.
Hi L.,
My advice to you is don't give up. Teenagers need structure. I have 4 children, 2 being teens 18 & 15. You need to get them on a routine. We have a daily-to-do list (which we set Monday - Friday) for all of the kids. Each one having to clean their own rooms and pick up their bathrooms, (each day after school). From there they have a couple of chores each week, anywhere from vacuuming, dishes, cleaning off the table, taking the trash out, taking care of the animals, etc...which we divide and they trade off for something different each week (so they do a little of each thing every month). This also helps them to learn to work together.
All of which they have to do after school & homework, but before they can go play or do fun activities or they don't play! (And you have to stick to your guns and don't give up!)
I know that it may sound like alot, but it really isn't once they get the routine. This gives them responsiblities and helps teach them to take care of things so that when they do leave the nest, you won't worry so much, knowing that they are capable.
You will have one clean and orderly home.....with everyones help!
Good Luck!