My boyfriend got gasoline on his clothes at work (they weren't soaked, they just had a bit of gasoline on them which made them noticeably smelly). I made the mistake of washing them with a bunch of my clothes ( I know, bad choice.) And they all came out smelling slightly of gasoline. I have now washed the clothes 3 times. Is it safe to put in the dryer now? I don't want to start a fire.