Using television as a sleep aid is a fairly common practice, with about 60% of adults watching TV in the hour before they sleep, according to the website Sleep, as they consider it a comfortable way to relax after a tiring day. However, this nightly TV habit may be more harmful than beneficial. A new study has warned that sleeping while watching television may lead to feelings of fatigue, as the human brain remains alert to unfamiliar sounds during sleep to face potential threats, according to the British newspaper "Daily Mail."