I prefer the DIY high pressure spray car washes (touchless) over the others. All those pads/scrubbers and rotating brushes leave swirl marks in the finish because road dirt gets trapped in them from other cars and from your car. It's like doing a clay job without the clay.

Just spray it off manually with high press soap then gently rub with a soft cloth if necessary. Rinse with high press water then chamois off so you dont get water spots. If you have already done a nice wax job, you can spray on a flash wax when the surface is still wet then towel off for a protective finish.

I also prefer to use a hard surface protectant on the windows such as rain x so you can scrape off the ice with no problems and no engine idling.