No, you don’t. You can simply use your hand or any other object that will work to squelch the fire after it goes out naturally. Just make sure not to pour water onto an already lit gasoline can fire starter! That would be very dangerous and counterproductive for obvious reasons. The best way of extinguishing the flame without using something like our top pick is by smothering it with sand, dirt, etc., so long as nothing flammable exists nearby. A good question – thankfully there are no downsides associated with this product which means you get what you pay for at 100% value guaranteed when compared to most other options on the market.