Yes, the light bar requires cleaning since it remains exposed to the weather all the time. Even dust-proof and water-resistant LED light bar needs basic cleaning and maintenance. You must give it a wash once or twice a month. Another important thing to note is that you must wash the accessories mounted on your car by hand washing. The car accessories can get damaged if you expose them to a pressure washer. Furthermore, never expose the LED light bar to chemical compounds and other harsh products. The basic cleaning tools can give an excellent performance. If you are washing your car, un-mount all the accessories installed on the vehicle first. The LED light bar needs to be cleaned separately.