It needs a bigger reservoir... And I know I've got wax in my ears and I didn't see anything come out in the shower in fact some water got trapped in my ear.. and that was on the strong setting I guess you need one good fill up for each ear.
The WUSH Pro Water Powered Ear Cleaner I received is useless defected junk, does not work, the WUSH would not charge, no matter how long it charges, will not power on.