Forum:If devil fruit powers return after the user dies, what about weapons that have "eaten" the fruit?

I just thought about it now since I'm watching Enies Lobby again and Spandam ordered his elephant "Funkfreed" to come back and it's a sword that's eaten the devil fruit. Since we know devil fruit powers return to the world once the user dies then what about weapons? If someone made a sword eat the Mera Mera fruit then you'd have an eternal flmaing sword right? Then someone with a lot of time could trap all the devil fruit powers into weapons and eventually no one could eat the fruits because they're all weapons....so would you have to destroy the weapon (kill it if it's a Zoan like Funkfreed) to return it's power to the world?