Just when you thought you'd heard every travel tip under the sun, someone comes up with a fresh idea that makes you wonder how you didn't think of it first.
That's exactly what happened with one traveller's excellent travel hack that was so good it sparked a flurry of other truly clever hotel tips.
The hack, shared by Twitter user Rick Klau, has had close to 400,000 likes and 75,000 comments since it went up on Friday.
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And it appeals to anyone who's struggled with hotel blackout curtains' frustrating inability to meet in the middle, which is particularly vexing when you're trying to sleep off jet lag.