My husband was cleaning the gas tank to his jetski which is parked in our yard on the side of the house. The gas spilled I would say between 2 to 3 gallons of gas spilled onto the grass right on the outside wall of the house. Now the whole house smells like gas but specially my son's room because his wall is the outside wall where the spill happened. How do I get rid of the smell fast, it's giving me a headache.