The cost of these accidents is high in both personal suffering and in spent insurance dollars. Vapors from flammable liquids can be deadly. Seal both the spout and the vent. If vapors reach a source of ignition, like a spark from a motor, home appliance, electrical outlet, or pilot light, those vapors can ignite. Gasoline is not a cleaning fluid.
Gas is for combustion in motors.
You re taking a chance every time you use it for a different purpose. You should not store lawnmower gas, paint thinner, and such in your garage or utility room. Such a practice puts you at risk. Gas, other fuels, solvents and such should be kept out of reach of small children. Older children should also understand these items should be left alone.