Thread: How do you prevent rust in your gun safe?

Evening all

Kind of a basic question at first glance but despite employing most of the obvious techniques I am still finding slight surface rusting, mainly on a Baikal single shot but also surprisingly on a Tikka SS.
Im very generous with gun oil (G96) and have even slathered on grease on the baikal, run a dehumidifier in the wardrobe where the safe is yet still confronted with it. Next step,is to try and rig up a light bulb I guess to keep guns warm.
It’s annoying as putting me off buying anything blued in case it goes rusty.
Cheers