On 8/14/2016 4:09 PM, Frank wrote:
On 8/14/2016 3:32 PM, mike wrote:
My kitchen faucet moves left/right via concentric
cylinders. IIRC, they're brass.
It's getting stiff and I want to lubricate it.
What can I use that's non-toxic and harmless to the O-rings?
Probably can't be water-soluble either.

I'd clean or replace them. Grease may swell an o-ring. Happened to me
when I put Vaseline on one.

There are food safe silicone lubes for o-rings, but as you say,
replacing is probably the best bet long term.