Problem with door mechanism

Innocence80

Registered User
My door catch has recently been playing up, the latch sticks in the closed position and I have to drop it down using my key to wedge it out before the door will close. Do I need to buy a new latch mechanism or is there something I can do to stop it sticking? It has been taken apart, fully greased but it's made it worse and Im sick of going to close the door and it bouncing open because the latch is stuck! It's a A4 cabby.
 
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