I quit using my WD-40 Specialist and started using Safariland Breakfree Collector. I don;t keep my guns outdoors and the Breakfree Colector needs no checking for five years in my gun safe, which has three humidity charcoal canisters that I bake in the oven every-other-month.

The only time my basement creeps into the +60 humidity number, is the three months of summer.

That Wd-40 Specialist comes out of that spray can in a thrust so strong, it knocks the cotton patch out of my hand.

So I banned it, for I never adopted the practice of shooting sprays down the bore of my rifles, then using a dry patch to evenly distribute it's contents. I'd rather spray the liquid on a patch first, then apply the bore brush to it.