Hello @D.Taylor 

Interesting one. I found two useful articles in the Knowledge Base that might help here: 

1. Viewing your machine's air quality graphs
2. Cleaning the sensor

Looking through the online app reviews it seems that this is caused when the sensors need cleaning. I would urge them to start there.

Hope this helps :) 

Hi @D.Taylor @Charliebrown, 

You’ve solved this :) 

If there is nothing in the environment that could be causing this, it is usually due to a blockage in the machines sensor port(s). We suggest cleaning the sensors as per Cleaning the sensor article.

Further instructions on cleaning the machine can of course be found in the user guide and directly in the App under 'Using your machine' and 'Cleaning your machine'.

If you’re passing this information onto someone, ask that they ensure their machine is switched off during this cleaning process.

Hey David. 

I’ve just had this happen on my machine. 

Solved it first time using the recommendation / best answer. 

great article. Thanks all. 

Emma :)