Razer Kiyo horizon off / how to adjust side to side tilt

First post, sorry if I'm doing it wrong. My Razer Kiyo seems to be slightly off kilter, so that the shelves behind me look like they're heading slightly downhill left to right. Rotating the camera doesn't seem to help, it's as if the camera is adjusting to its own idea of what is straight. I can't find a way to adjust this in Synapse 3 (only pan or forward/back tilt), does anyone know how to do that?