Apple watch factory reset

Is there any way to factory reset an apple watch from a computer? My watch is no longer paired to my phone and the screen is cracked and doesn't work so I cannot re-pair it to my iPhone. The very bottom of my screen on the watch works and I have tried to reset it but unfortunately everything I need to press is at the top of the screen. If I could just switch the orientation to have the digital crown on the opposite side then everything would be on the side of the screen that I can push. I have tried asking siri on the watch, but she is not that advanced to switch the orientation or to reset the watch. SOS