At least that's according to a Reddit user named mehow44 who said some airlines don't bother to swap out or clean blankets between flights. istock The Reddit user said blankets are refolded between flights. And those trays, yeah, never saw them cleaned or sanitised once." It seems you can't even be sure your blanket's clean if it's in plastic packaging. In 2008, the Wall Street Journal reported that most airlines only wash their blankets every five to 30 days.

Source: Stuff February 07, 2019 20:15 UTC