>>288874842
If you find the sweet spot (for both eyes) it helps a lot, but won't eliminate it entirely. Try closing one eye and adjusting the headset until you're in the sweetspot, and do the same with the other to get an idea of the rough location - Should make fitting it a bit easier later. Obviously reducing brightness through advanced settings or otherwise will help too.
That said, there will always be some glare and the amount depends on your headset and the lenses inside - I think Oculus have the best lenses but it's still noticeable in a Rift S. If you use prescription lenses that will also add more glare along with chromatic aberration.