With us he stopped after about 1 year to run. He only became weaker, indicating batteries. However, new batteries brought no improvement.
The solution: the lower small blue unit in the engine sits (the part that is in the water) must be screwed. The blue caps are removed and taken off the tube front of the engine (it is just plugged in). Now the present dirt and remove above all the lime. We have the easily scraped off with a small screwdriver. And now it's back! Anyone with a little skill can do it.
Against throwaway !!
Have fun with the great part!
