There's a deal right now on one of those electronic makeup brush cleaners for $17.59!

Makeup Brush Cleaner by Beautify Beauties, Best Cleaner for Makeup Brushes, Washes and Dries Brushes Instantly - Batteries Included

I have one of these, and they work pretty well. I'd just recommend investing in a set of rechargeable batteries, because they burn through batteries like lightning!