I had this issue and couldn't find a guide to fix it. My crosshair just spun to the left and got worse the higher my sensitivity was. All you need to do is unplug any controllers you have plugged in. Pretty much anything you use to input. My USB nes controller was plugged in and was causing this even though buttons weren't being pushed or anything. Another person had an issue with this while having their gamecube usb adapter plugged in. Hope this helps!