Bleed valve

Anyone any tips on sealing the front left hose bleed valve.Mine is leaking even though I replaced the hose a couple of years ago.Ive got a new hose on the way but would appreciate any advice.

PTFE tape?

Yeah, I’d give a bit of PTFE tape a whirl.

Does the screw have the o ring on it ?
There should be one to seal the screw face to face with the hose insert.