1. Fill the bottle with drinking bottled water at 35-40°C, up to the line indicating the 240 ml level.

2. Hypertonic solution: Dissolve the contents of 2 sachets in the bottle. Useful in cases of nasal congestion due to upper respiratory tract diseases.

Isotonic Solution: Dissolve the contents of 1 sachet in the bottle. Useful for preventing secretion accumulation or for daily cleaning of the nasal cavity.

Shake the bottle until the powder is fully dissolved in the water.

3. Tilt your head sideways and slightly forward.

4. Insert the tip of the bottle into one nostril, breathing with your mouth open.

5. Apply slight pressure to the bottom of the bottle. Wait until the solution passes through your nose, coming out of the opposite nostril.

6. During the wash, breathe with your mouth open.

7. After the wash (half the bottle), remain for a while with your head slightly turned forward.

8. Repeat the same process with the remaining half of the solution in the other nostril.

9. Gently blow your nose.

10. After each use, fill the bottle with water and add a few drops of liquid soap, then shake vigorously to clean it effectively.

11. Dry the inside with a towel or let it air dry before the next use.

Isotonic solution: up to 3 times a day.

Hypertonic solution: 1-2 times a day, depending on the severity of the condition.