Boneco W200 LED Blocker

A LED blocker for Boneco W200 humidifier/air washer. Our humidifier is setup in the bedroom and LED was somewhat distracting my sleep. So I quickly sketched up a light blocker that simply slides on the original knob. The pro of the model vs a piece of tape is that you can still see the LED if you look at it from a side/top/bottom, therefore you can see the status of the machine.