I have 4 young people, 15 up to 22.
I've stopped asking for laundry or picking up laundry. If it's not in the wash bin I don't wash it. Any approximation near the wash bin gets left where it fell.
It gets put in the wash by them eventually, it's their choice. One of mine had to wear the same sports gear to a hobby three weeks in a row, they smelt ripe and looked grim! They were also furious with me not just picking it off the floor and washing it for them!
I don't put clothes in their rooms, I put the neatly ironed pile in the open doorway so they have to move them to shut the door.
I stopped asking for dishes but I won't had over food until they bring down dishes. I stand there with the dinner and wait. Cue huffing and puffing and lots of can I do it afterwards....
When we all get out of the car after shopping or a day out I don't open the front door until everyone has helped carry bags in. Lots of grumpy.
I don't remind them to take coats and hoodies when they go out, all I got was eye rolling and huffing. If they want to be cold and wet they can decide.
I will vacuum if the floors are clear in their rooms. It's their room and their choice. I do strip, wash and clean beds though. One of mine had the most embarrassing afternoon when friends called in unexpectedly.....
I don't ask for lunch boxes to wash, I refuse to go hunting for them. Eventually they appear.
The thing that irritates is they are often left in a random piles in the utility, not near the kitchen dishwasher. I refuse to wash them unless they are emptied and stacked by the dishwasher.
Eventually they run out of things, eventually things smell and they realise, it just takes them living without me doing it to get them to realise they have to step up.
I'm practising the 'that's nice dear'.
Phones and devices get a warning then a follow up warning. If they are found on them into the night then the IP address gets blocked at the agreed time via a clever app. It will come back on the next morning. Nothing makes a teen quite so cross as a blocked IP address.
If they are refusing to get out of bed for something I'll get myself ready to go then potter in the garden for a while whilst I wait. I don't like to be idle.
They ignored the three wake up calls and are furious when they are calling me urgently to help get them ready and find me in the garden.
Teenagers are quite capable of getting out of bed when it suits them. Them leaving barely 5 mins and barking tasks at me doesn't work when I'm in the garden.....
I'm no longer a slave to stress. It's up to them as teenagers to step up a bit. I'm here to help them help themselves.
I think I'm hardened to it now, going in to my 10th year as a mother of teenagers!