I cleaned mine after one year and it needed it. I didn't drive in dusty conditions, either. All the screws are accesable from the top of the car. Look for slots in the front of the frame that you can stick a socket extension through. You'll see some screws that hold in the lights. I had to watch Jay Lilley do it a couple of times to get it right. Tom With the Dinan Cold Air Intake, how long can you keep a filter ? Even to look at it, I will have to remove the head light. The manual says to remove the 4 headed screws. There are obviously 2 on top, but where are the 2 other one ?