1. Remove the lens cover.
2. Remove the lens housing.
3. First thing in the morning before eating, drinking, smoking or brushing your teeth, apply a thick drop of saliva (without bubbles) to the glass surface.
4. Wait for the saliva to dry. This will take about 5-15 minutes (the saliva must be completely dry for accurate results).
5. Replace the lens housing onto the tube.
6. Hold the monitor up to your eyes to view the image.
7. Compare the image to the chart supplied with the kit (see right-hand side of the chart).
8. Record your results in the KNOWHEN® App.
9. Keep device covered at all times for longer battery life!