Snow foam is used to get as much of the dirt off as possible before having to physically touch your vehicle during your wash.
Dilute your chosen snow foam product according to the manufacturer instructions.
Apply in straight lines from the bottom of the vehicle ensuring ensuring complete coverage. Don't forget wheels and inside wheel arches.
Allow the foam to dwell for around 5-10 minutes, this ensures dirt and grime is dissolved and pulled away from the paintwork.
Rinse your vehicle from the bottom up.