There is a small vent in the reservoir door (where you put water/mouthwash) opening to let air in as water is drawn out. If the vent is blocked, it will reduced and eventually stop the water flow.

To clean the reservoir vent, follow the steps below:

1. Take a damp/moist paper tower or cotton swab
2. Wipe along the inside edge of the reservoir door opening, especially on the top area
3. Rinse well with cold tap water and ensure that there are no debris/dust left

Note: Ensure that there are no debris from paper tower or cotton swab inside the reservoir area.

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