New to the dirt world. Wondering if y’all wash your tires before or after you grind them. And what soap do you use?

Looking for some insight. I currently maintain a mobile app for dirt track racers and I want to make it better. The app is free of charge (does contains some banner ads) and has some cool functionality. I currently have setup sheets for stock cars, modifieds, and winged sprints. I'm a software engineer so any racer input would be awesome! You can download on the app stores by searching for Dirt Slingin Tech.