Over time, your air-conditioning system can be contaminated by bacteria. This build-up leads to bad odours and poor air flow. A/C cleaner 210 can help clean and refresh your entire A/C system in just 10 minutes, leaving it clean and fresh. It cleans and refreshes, eliminates odours and bacteria, and is a fast and easy job that works in 10 minutes. It has a fresh scent and a simple 'Lock & Leave' function. Usage Directions: Shake well before use. Start the engine and set the A/C to internal circulation at full power. Open all vents and close all the windows. Ensure the front passenger seat is pushed and tilted as far forward as possible. Place the can on the floor or a flat surface, two-thirds from the front passenger seat, with nothing obstructing the spray pattern. Activate the can by pressing down on the valve. Close the door and make sure all windows are also closed. Wait 10 minutes until the can is empty. Then switch off the A/C system and engine. Open all doors and windows to ventilate the vehicle. For best results, remove any sources of unwanted odours. Park the car outside in a cool, shady location.