I'm having a tough time getting some fallout/oil residue from work off my car. I'm fairly certain it's soybean oil venting from our fryers (no I don't work at a fast food joint lol). The exhaust fans pull it out and it looks like it is atomizing it, into tiny droplets, like ballpoint pen sized drops. It's all over the car. I've washed it with Dawn dish soap a couple of times, and that isn't taking it off. Any other ideas? Would a clay bar take it off? I don't really want to have to clay it to remove it, but I can if that is what it takes. I'm looking for other options.