Organic Coconut Oil
A small bowl or plate
*Note* Used a bit too much of the coconut oil in this pic. About half that amount would be sufficient.
What you'll do:
Coconut oil tends to be a semi-solid at room temperature so you will need to stir the two ingredients together for a couple seconds to mix them.
Next, take your make-up brushes, one at a time, and swirl them around in the bowl. You'll see almost immediately how the color of the oil and dish washing liquid turns a yucky color as the make-up and dirty come out of your brush.
Next, swirl the bristles in your palm filled with warm water or hold the brush under running warm water. While doing this entire process, avoid getting water and soap in the ferrule (see pic below). This will weaken the glue that holds the bristles in place and your brush life will be significantly shorter.
Let them dry flat on a paper towel; don't dry them upright, as this will allow the remaining bit of water to seep into the ferrule. Usually overnight will do it.
If your mixture begins to look like the picture below, put fresh ingredients in the bowl. No point in putting more dirt and make-up on your brushes as you are cleaning them.