[DaleHCook]

I had no problem with cleaners or solvent in removing the garage dirt and nicotine.

If you had nicotine on a radio you would not have cleaned it, because you would not have known it was there. Nicotine is a colorless and odorless chemical. What you were cleaning is tobacco tar, which is an entirely different matter. Nicotine is what makes tobacco addictive, tar is what kills people.