>>336670463
>smoke smell
Honestly that could contribute even if it's just placebo.But it is probably IPD. 

Don't measure your IPD (it's unreliable for several reasons). Instead, put the headset on, find a menu with small but sharp text, and then move the headset slightly left and right while having one eye closed, and looking straight ahead. You'll notice that the text gets sharper or blurrier as you move closer to the "center" of the lens. 

By knowing how to look for a lens' center or "sweet spot", you'll know the optimal positioning. Now you can find out if the headset's lenses are farther apart than your eyes, or closer together. 

Then adjust the IPD like this: 
https://youtu.be/xnfuMcakBEw?t=97