What a desappointment! The jet lacks power and completely fails to dislodge small debris between teeth ... unnecessary purchase. Previous models were more efficient. I brought mine to the repair center and they made me the first time, saying that there was "an air call" that reduced the power of the jet. On my return home, as I did not notice any improvement, I brought them. Then they told me that other customers had complained about the same thing and they could not do anything more ...