Using the Injen Pro Tech Charger Cleaning Kit is easy. First, remove your air filter from the vehicle. Spray Injen's filter cleaner evenly on the dirty filter. Let it sit for a few minutes to allow the cleaner to loosen the dirt and debris. Then, gently rinse the filter with water until the water runs clear. After that, let the filter dry completely. Next, apply the Injen air filter oil with the red dye. The dye helps you see where the oil has reached, so you don't over - oil the filter. Just make sure to apply it evenly. When it comes to maintenance, use this kit regularly to keep your Injen high - flow air filter performing well. Remember, if you have an Injen SuperNano - Web dry media filter, don't use any cleaner or oil on it, as it will void the warranty.