You hear about life hacks all of the time, but how well do they actually work? Well, John Green, the author of The Fault in Our Stars and Paper Towns, is going to get to the bottom of it.

In the video down below, he tries out a bunch of different life hacks that people on the Internet swear by to see if they're actually worth trying. Some of them actually work pretty well, but there are others you shouldn't waste your time with. To find out which is which, watch the video:

What other life hacks have you heard about that are actually BS?