Hi @Ethanol, thank you very much for getting in touch with us over here at the Dyson Community.

We have some guided content on the Community that may help you resolve the current issue with the water level not decreasing on your Dyson PH01 Purifier Humidifier. 

The following article can walk you through how to resolve this, as well as providing helpful links to our online support and YouTube channel:

If you wanted to head directly to our online support, simple use our Guides and manuals link. Then select your machine from the options available and navigate through to the ‘Troubleshooting’ page. Here you will find a host of selectable options designed to support you and your machine.

Be sure to let us know if you need any more assistance. 

Our office humidifier had the same issue. If I remember correctly, the water level hasn’t dropped in 3 days. 

Running a deep clean solved it. Though the instructions weren’t easy to locate. 

Thank god for the community!