Question for those who have rooted the S5

Okay so I rooted my S5 using towelroot and then I installed X-posed. I am now having troubles with waking up my screen or making it go to sleep. I have a feeling something went wrong during the install of X-posed. My question (only because this is so different from any other root I have done) since X-posed alters the firmware how can I uninstall it without loosing root. Or what should I be doing differently.

Thanks.

D