How to use Mixer Brush Tool in Photoshop CS6

Steps:

1. Select Mixer Brush Tool from Tools Panel under Brush Tool.
2. Control Panel Settings:
1. Use Clean Brush
2. Make sure load brush after every stroke is not checked
3. Use Custom Brush
4. All Values of Wet,Mix,Load,Flow are below 15%
5. Wet: 10%
6. Mix: 12%
7. Load: 8%
8. Flow: 12%
3. With all above settings done use the brush on the picture.
4. Make sure not to mix up dark areas with bright areas and vise-versa.

Please Watch Above Video for Detailed Explanation of the Tool.