Cornie keg maintenance

[Northern Brewer]

On one cornie beer seeps out when I put the QD on it, doesn't seep on other kegs so I think its the O-ring on the post so I'll swap out the o-ring today.

if it's not a personal question, do you lube your ring with this stuff

 

[Northern Brewer]

problem solved - there was no O-ring on the post! Must try and wear the specs more