leaking bidet hose

[sisaket]

I have just replaced hose to a hand held bidet and it is leaking, have put PTFE tape on the screw thread however it still leaks and it is my view that it leaks on the hose side of the connection-ie I think that the washer is not flush with the hose and it leaks there, runs down the inside of the connection and out along the hose. Is there anything that can be put between the rubber washer and the brass end of the hose to ensure a secure seal?