My brush collection
I own quit alot of brushes, although I would like to have more ;-D Anyways, this is what it looks like when I clean most of them. I try to deep clean (with baby shampoo) once a week. This is a little depending on how much I have used them over the last week. Sometimes its two weeks between but I try to atleast to semi regularly. When I dont deep clean I use a brush cleaner from Isadora after each use. This helps me from accidentally putting bright blue eyeshadow on by mistake. If you try to make a habit out of it, its not really a hassle when you have to do it.
My favorite brushes are from Nilens Jord and they are bought at Matas in Malmö. They are affordable, good quality and really nice to work with. If you ever have a chance to try these: DO IT. I have never tried their makeup but from their website some of it looks really interesting.