Hi Marc, I had the same but in reality it is not what you think. First remark, you can avoid this by drying the two metal contacts at the end of the water collect pins. ( in the water collect bin) If they connect via water then it will display Full. So this is something you should think of. But the most important thing is something else. You should remind yourself that you only clean the water and dirt when the coffee machine is switched ON. Reson for this is if you empty the tray with dirt or water it is not seen by the machine when you do this if the system is switched off. So next time your coffee machine prompts for empty the tray. you should do this when system detects that you opened the bin. Otherwise aldo you just cleaned it, it stays prompting clean tray. Also note every time you open the dirt tray you have to clean/empty it as the machine things you did. When you take that into account you will not be falls prompt again (unless the two metal plates in the back are full with dirt (shortcuted)