I had a weird thing happened today. I turned on the car aquamist gauge turned on as usual but then indicator light gradually started to dim out until it fully turn off. At the moment it is off. I haven't had a chance to check what the issue might be. Any ideas what it could be? This is the first time my gauge shut off on me and I just don't know what it might be the cause.

 

Are you using the auto-dim option?