A foam pre-wash is the professional's first step: thick foam softens and lifts surface dirt before any contact, dramatically lowering the risk of wash marring. Here is MJJC's five-step routine.
Five steps
- 01
Pick the right cannon and connector
Match your washer brand (Karcher, Nilfisk, Bosch, Lavor…) with the dedicated connector version.
- 02
Mix the foam at the right ratio
Use the measuring cap or bottle marks to add MJJC Foam and warm water — no shaking needed.
- 03
Pre-wash top to bottom, full coverage
Start at the roof and let foam flow over doors, fenders and wheels.
- 04
Let it dwell and lift the dirt
Wait 3–5 minutes while foam softens grime and bugs — never let it dry on paint.
- 05
Rinse under pressure, then contact wash
Rinse top to bottom, then wash with a mitt using the two-bucket method.
A great pre-wash cuts wiping in half — and slashes swirl risk.
Ready to upgrade your pre-wash? Meet the foam cannons built for your car.