'Sleepmaxxing' is the wellness trend of optimising sleep quality with every available trick — mouth tape, blue-light glasses, mouth posture, cold rooms, blackout curtains, magnesium, no late screens. Part of a broader '-maxxing' trend (looksmaxxing, gymmaxxing) that frames every behaviour as optimisable. Most sleep advice is sound; some (like mouth taping) is contested medically. If your teen is sleepmaxxing, they are focused on sleep quality. Worth a chat if any technique seems risky.