I was filling the gas tank of my boat,and acidentally dumped about 2 gallons of gas on the garage floor. I mopped up most of the excess with some rags and then burned the rags. Then I put a big fan behind the spill to push the fumes out the door. All of the liquid has now evaporated,but it still smells like gas in the garage. What can I use to get rid of the gas smell,or should I just wait until it fades on its own?