Anti-Squeak Spray?

[beancaker]

Any ideas for a temporary quick fix for an irritating squeak from n/s rear suspension on my Griff? I'm thinking douse the area in some sort of spray lubrication/penetrant??
Poly bushes, SH droplinks & Nitrons fitted four years ago,
Hoping it's not the Nitrons. Passed mot with no advisoroes, so can't be anything too drastic...

[beancaker]

Colin RedGriff said:

I had this with the Poly bushes on my Griff (they were properly lubed when I fitted them). A good spray with WD40 fixed the issue for me.

Any chance that WD40 might degrade the poly bushes? I was thinking maybe some kind of silicone lubricant?