I filled the bottle with alcohol instead of blending solution. I already have markers with blending solution so I wanted this one to just have alcohol, but blending solution would work just as well. When you use it you just tip the bottle up and wet the nub. Don't squeeze the bottle when you use it, or it will leak. If you don't squeeze the bottle, you will be fine. You can see in the picture that mine is worn and dirty from much use. Still works great! I hope that you find this tip as helpful as I have.
Paint with all your colors!