As a non-shedding breed, the hair inside the Lagotto ear grows constantly. Whilst some hair is healthy, indeed desirable, to protect the Lagotto from its natural ability to work in water in all seasons, hair inside the ear that is left to build up will prevent the ear from draining properly and wax will start to accumulate. Excess hear should be removed.
It is wise to get your Lagotto used to having its ears inspected from an early age so that you can check for any problems.