look through these products and see if one of them fits your needs. I cannot recommend any of them as I have not used them, but I buy quite a few car washing products from them. I do not allow food or drinks other than water in any of our cars, so have not had to deal with it before. I am just weird about that. My parents were the same way. Fred
http://www.properautocare.com/carfabcarpro1.html
PS: always test any product in an obscure area to make sure that the cure is not worse than the problem.