What if I told you all you need is some duct tape and tape the sensor then he in your call wait awhile your screen will turn off at first then hit the power button once then there you go! You're free. And all you need is duct tape or some other sticky non-see through material.
If you don't know where the sensors are they should be that 2 unoticable dots on your phone to the left. (First Gen Moto X)