How to make INSIGHT Primer Fluid?
If you use up the fluid that came with the Insight headset, you can acquire glycerin and saline from local drug to make the fluid. For the Primer Fluid- Please source food grade glycerin and Saline Solution (Eye contact cleaning solution) and mix 70% saline and 30% glycerin. The primer fluid should be applied to each sensor tip. I would also recommend wiping down the headset between users with antibacterial wipes for hygiene.
For cleaning the sensor, please refer to The tips on cleaning INSIGHT sensors