Wash an old mascara container and fill with: 1/4 of the container with Castor Oil, 1/2 Vitamin E Oil, 1/4 Aloe Vera Gel. Mix the concoction together as well as you can with your mascara wand, and apply a light layer to lashes (or brows) every night before bed. Castor oil thickens your lashes while aloe vera gel lengthens. Vitamin E accelerates length. Give it a month for results.
I have been buying Sephora daily sanitizer and shampoo for my brushes for years, spending ungodly amounts of money on products that I feel are subpar. I just did this to my brushes and not only did they get cleaner then Sephora shampoo but it also took a third of the time!!