Does anyone know what will take stains off the black plastic on the cowl?I have tried mothers back to black and it didnt even touch it.It looks like what ever kind of windshield washer fluid they put in it from the factory did it,because the stains are right next to the washer fluid sprayers.I didnt notice it untill I used the washer for the first time then I noticed the spots the next day.It looks like a water spot that gets on your paint but way worse.I also tried a little water and vinegar and that didnt work.Thanks for any help.