Let's begin by explaining why lazy people like me really, really need to start cleaning their makeup brushes.
Brushes quickly build up oil, dust, dead skin and bacteria, which can easily irritate sensitive skin, cause breakouts and, in frighteningly severe cases, even life-threatening infections.
Basically, not cleaning your makeup brushes is the equivalent of not washing your towels or wiping the kitchen bench with a year-old chux.
Washing them properly (a.k.a with an anti-bacterial soap or shampoo) and regularly (perfect world, once a week, real world, once a month) will improve their makeup application and make them last longer.
Now, to the how.
First thing to note is this product comes with a lot of parts. It's a mini machine.
In the box you'll find the bowl and neck guard, eight collar attachments and the motorised handle/stick, which a co-worker pointed out looks a lot like a small vibrator.
PLEASE DO NOT USE THIS AS A VIBRATOR. You will burn things.