One of my safes is 7yrs old & theres been a Goldenrod plugged into it since day one. My second safe is 2 months old & was put in my new farmhouse. Goldenrods will last for decades. (I always wipe the guns down before putting them into the safe as is common sense but also DON'T put a cold gun into a safe with a Goldenrod in it or condensation can occur on the gun & especially IN it! Let the gun sit for an hour or so to assume roomtemp then put it in the warm safe)