I have a quick query.
I have been using kegs for more than 6 years and I have never put any lube on the main lid seals.
My kegs keep their pressure, the beer doesn't go off even over a >12 month period and while over time the flavour profile changes, I just finished a 10 month old Red Ale which was still very nice from a second hand AEB keg.
My kegs were all second hand until the recent purchase of new AEB and large KK kegs which I haven't tried out as yet.
I am wondering what I might be missing out on by not using lube?