Boot Cleaning Kit Anyone Know How To Use The Ugg Boot Brush That Comes With Care Kit?

Anyone know how to use the ugg boot brush that comes with care kit? - boot cleaning kit

I baught a package of care UGG boot, a brown in a box with a cleaning fluid, water repellent and equipment to spray into the shoes.
Theres this brush here, but no instructions, is a small brush at the end and the other side is a rectangular piece of plaster and wood sides, there are some things seem a little like a plastic knife. What do you do with it?

I've only my own UGG boots on the back of the bottle shown, but said nothing unusual about this brush?