Cleaning is normally associated with soaps and other chemicals. Ultra-fine nanobubbles, particularly CO2 nanobubbles, are an effective and earth friendly alternative. Gaia ultra-fine nanobubble technology has been widely, effectively and economically used to clean everything from cars to windows to heavy equipment to metals to commercial buildings and more. The combination of the penetration properties of  nanobubbles and the degreasing capabilities of CO2, provides a chemical-free, effective solution for both small and large scale cleaning applications.