[Q] LG Optimus 4X HD P880 front camera problems topic

Hi. My LG Optimus 4X HD's front camera is reaally dark in some quite well lit situations. My friends' phones front camera works well on the same lighting. I wanted to ask you a question, how can i increase the exposure of my front camera permanently on snapchat, messenger etc.? On those appd, you can't change the exposure.. If you were wondering, I'm running CM 11. Thanks!