I have one girlfriend who loves to play beauty school. On New Years Eve we were primping and she is very specific about her makeup brushes; this girl knows what brushes to use for what function, but she is also very good about brush maintenance. So good, she whipped out these Sephora Makeup Brush Cleansing Wipes, $9 for a pack of 20, and kept her brushes clean and organized right then and there.
January is a good time to wipe the slate clean and do a thorough makeup brush cleansing. So, if you're on-the-go I'd invest in these wipes, and this weekend set aside some time to do this do-it-yourself brush cleaning method and make sure you are using a professional brush cleaner.