I never let my car get very dirty either it never goes more than a week without a wash or more than around 30-50 miles driving wise without getting washed but since it is white, dirt that gets picked up on the boot and on the side skirts get shifted with ease and leaves you with a good clean base to start washing with a mitt. Like I said only owned the snow foam lance 2 weeks but if you don't let your car get dirty then imo it isn't totally necessary. It does work well on a dirty car as I tried it on the old man's BMW hadn't been washed in maybe about 3 months and was actually impressed at what it lifted off.