The outlet washer starts to curl and fray, this is enough to grab the side out the outlet cylinder. Just replace the washer with an ORIGINAL and it should last a few more years.
All advice is given with-out seeing the job, and hence all advice MUST be taken as advice with limited knowledge on the exact situation. NO responsibility can or will be taken. And yes, I am a licensed Plumber and Drainer with my own business in Brisbane Australia