Why two buckets? A separate rinse bucket will remove the dirt that your wash mitt picks up. If you use a single bucket, you'll be depositing all that dirt into the soapy water, loading it back onto your wash mitt,and rubbing it all over your car!
Fill one bucket with car wash soap and water (mixed as per the instructions on the bottle) and the other bucket with clear water. Dip your wash mitt in the soapy-water bucket, wash a small section, then rinse your wash mitt in the clear-water bucket before reloading with suds.
Products used:
Mothers Wash Bucket (compare prices)
Mothers California Gold Car Wash (compare prices)


