Cleaning brushes

Hi everyone,

My lovely mom bought me a BBB two months ago. I really like it! It also has a little brush/comb thingy to clean it. If I clean my BBB with the cleaner thing, it gets the hairs and bigger stuff out but the small dust remains. How can I clean it?
And how often should I clean it?
A also have a plastic brush and normally I clean it by letting it soak in a bucket of water and soap, rinsing it and letting it dry. But I thought maybe there is a quicker way for it dries super slow.



Light brown hair.
30 inch to the mid of my back. I want to to be to my tail-bone and see if I can grow it any longer than that.
2bNiii with spiral curls at my ears.