Also, I've been smelling this really strong odor the past few nights. I'm out the back a fair bit so I am there to notice it. It seems to last around an hour, and it only happens at night. Suddenly there, around an hour later it just disappears. It smells very strongly of burning kerosene with just a pinch of rubber in there too. Now it could be one of my neighbors burning something, but were all on gas so it shouldn't be a wood fire. Another idea could be that with the cooler temps at night the trails remnants are condensing and falling. Or maybe they just leave the REALLY nasty stuff for night, when most people are inside asleep. Who knows. All I know is it stinks and gives me a headache. Also I can't smell it in my tin shed. Which is what made me think it was a falling rather than wafting. Anyways, has to add that with what I just smelled.