It just got super nice out in Chicago and I happily put in some new tires and a fresh tank of gas. Everything is going well until it's parked and then drip drip drip it's leaking gas all over the sidewalk. Not too fast, but not too slow either; maybe a drop or two every five seconds. It stopped over night, almost as if it was the direct sunlight and heat that made it start. Any suggestions? I'd really appreciate it.