Air filter cleaner incorporates a specially chosen blend of surfactants designed to instantly break down filter oil and dirt from the moment of contact and is 100% methanol free meaning it does not attack the foam or glue that holds the filter together, leaving your air filter intact and looking like new. Air Filter Cleaner is an easy, hassle-free way to clean your foam filter, whether you prefer to scrub or leave them to soak! This biodegradable cleaner is suitable for use with hot or cold water with no strong odour, making it perfect for home or trackside use.