One thing I learnt after destroying a Hadlay O-Ring when I first got it was after a good clean and rinse in warm water and letting it dry is to lube the O-Rings with PG. This is of particular importance with High End gear because the tolerances are so small. It may seem obvious to lube O-Rings but I didn't pay much attention to it (unless a cap was tight) originally but with the likes of the Skyline, Hussar, Kryten and Hadaly you simply have to.
An ear bud dipped into PG works like gangbusters.

An ear bud dipped into PG works like gangbusters.
