Yes
You have to remove the valve to clean the screen, clean the screen in place DO NOT attempt to remove the screen to clean because if you distort it even slightly it will not seat properly and particles can get past the screen and cause the valve to stick open and cause a FLOOD. Because of the small volume of water a modern DW uses this screen may the last one to ever clog in your home, so I would not worry about it unless you have time on your hands and nothing better to do, or if the DW is clearly showing signs of not getting enough water to work properly.