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I recently came across a brand new grundy style tap and it's a bit noisy and rattly. I bought the same kind of tap from GMK recently (second hand) and it doesn't have the same kind of problem so I took it apart to compare and noticed that it has some kind of grease in there, while the brand new tap does not. What kind of grease should I use? I've read in the past not to use petroleum based such as vaseline etc and I'm sure I even saw it mentioned that KY Jelly is supposed to be pretty good.