Have more than you think you need and put them everywhere. When the shit hits the fan things move quickly and you don't have time to find one or run one down. A solvent fire plus cardboard moves incredibly quickly. When you have several of them and they're in the goddamn way all the time you can find one in that 20 second window when you NEED IT. This $190 purchase: https://www.amazon.com/Amerex-B500-...e+Extinguisher+(4)&qid=1567461019&s=hi&sr=1-1 ^ just saved me a ton of money If you don't have some, get some. The one I used I had just put there a few days ago.