Zote Soap.
Zote laundry soap
EcoTools Makeup Brush/Sponge Cleansing Shampoo or some solid cleansing balms (Zote, Japonesque+
Here's how I clean mine, after many different techniques and products ++
Zote soap
Zote Soap is where it's at.
2nd Zote for synthetic brush cleansing.
I use the Zote soap, gets out all the goo. I also like a brush cleaning mat ++
This is what I do (note that for stuff like concealer, I apply soap directly and PULL ++
zote works amazingly great, plus it's pink and a dollar or so