Sleep experts from the University of Oxford have warned that the smell of a teenager's room could actually be disrupting their sleeping patterns.
When a teenager doesn't open their window and keeps the heating on, it risks them developing insomnia therefore affecting their studies.
A professor from the University Of Oxford said "Youths will be given advice on 'bedroom hygiene' as part of a nationwide study.
The smelly bedroom is a by-product of the fact that the room is full of rebreathed air, which is low in oxygen and high in nitrogen. If you keep rebreathing the same air in a small bedroom that is hot and not ventilated, you will wake up with a headache after a poor sleep."
Following the study, a sample of teenagers will be advised to open bedroom windows and turn down the heating. The study will last one year and will track 32,000 pupils in up to 100 schools for one year. The sample will be split into two groups, one starting school at 10am or later, and the other sample sticking to their usual schedule.
As part of the study, the teenagers will also be told to eliminate all technology that emits light from their bedroom before bed. At the beginning of the study the teenagers' grades will be recorded, their moods monitored and they will have wristbands to track sleeping patterns.
Our sleep expert, Dr Nerina Ramlakhan says, "Your bedroom is one of the most important factors when it comes to getting a great night's sleep. A calm, tranquil bedroom free from clutter, junk and technology will help you become more relaxed and rested".
For more sleep tips for your teenager visit our sleep toolkit.