A woman has gone viral on TikTok after sharing a hack that involves a sweatshirt to get the “best night’s sleep”. The clip has quickly racked up almost 10 million views in just a few days – but the sleep method isn’t for the faint-hearted. Crazy sweatshirt sleep hack “I’ve been getting the best sleep of my life for 4 nights now and I’m gonna show you how I’ve hacked this system,” she says in the viral video. The TikTok user grabs a sweatshirt and folds it in half with the sleeves hanging down. Then, she puts it over her head, covering her eyes but avoiding the nose and mouth. She then lays dow…