When your vehicle is full of slush and salty slop underneath . . . try not to park it in a heated garage or where it will get sun all day. Sounds backwards, but it isn’t. The salty slop all over and under your car will rust faster when warmed-up above freezing. I now leave my daily driver outside of my garage and try to park it in the shade when it is full of the salty slop during winter here in Pennsylvania . . . seems to be working for me. As it was explained to me . . . the rust reaction needs to be above 32 degrees to work. Rocketman