Leak in windshield washer fluid. I went to the dealer, they could not find it.
You have any idea where could be this hidden leak.
It looses at least a cup a day.

 

This should be easy to find. It is either the resevoir or the lines. The lines either leak at a connection or in the line. Have you notice low pressure on one side or the other? Do you lose fluid whether you wash windows or not? Most likely it is at a connection to the reservoir. I certainly wouldn't pay the dealer to track this down unless U have much more $ than time.

 

TY! But I'm as far as a mechanic as can be. But I'll take a look.