Don't just mask odors—eliminate them! This combo kit includes Germany's nextzett Klima Cleaner line of products. Musty odors coming from your air conditioner are often due to residue buildup on the evaporator core, the heart of your car's air conditioning and heating system. Klima Cleaner Pro, with its foaming cleaning system, effectively removes residue such as pollen and dust from the evaporator core. This not only cleans the system but also allows air to flow more efficiently for cooler air. The results last for months. For optimal performance, apply every six months. Between applications of Klima Cleaner Pro, use Klima Cleaner ETU for maintenance. It contains the same effective cleaners as Klima Cleaner Pro but is dispensed as a misting spray that circulates throughout the entire car interior, eliminating any odor-causing residue in its path.