Simple hand held methane detectors have been around for a few decades. This was used to great effect in the Kenny VS Spenny episode, Who Can Blow the Biggest F

Simple hand held methane detectors have been around for a few decades. This was used to great effect in the Kenny VS Spenny episode, Who Can Blow the Biggest Fart: https://youtu.be/ash2NzL1IHo https://youtu.be/ash2NzL1IHo (It’s a Canadian show)