Please check the following first:
- Has the water been changed? Replace the water in the tank every day with fresh water.
- Is the filter dry or at the end of its life? Please refer to "Weekly Maintenance" (chapter 4) in the Ovi manual and/or replace the filter.
The manual is available for download on this page under "Support & Downloads".

If the above does not solve your problem, please contact us at [email protected].