WeatherTech TechCare ジェントル カーシャンプー

Just a little bit of this concentrated soap makes a ton of suds, and I love how it rinses off completely clean without any streaky residue. My car's wax job still looks perfect after washing.

I was skeptical about a biodegradable shampoo actually protecting my wax, but after three washes the water still beads up like day one. It rinses clean with no streaks, and I barely use a capful per bucket.

A little goes a long way with this stuff, I only used a capful for my whole sedan and it still sudsed up great. It rinsed clean without leaving any streaks, and my wax coat still beads water a week later.