Using the Dracast Barndoors for your LED1000 is easy. Just slide them into the slot at the front of the light. They'll help you control how the light spreads and stop any unwanted light from going where you don't want it. When using the filter holder, make sure to place the filters securely. As for maintenance, keep them clean by gently wiping them with a soft cloth. Avoid using harsh chemicals as they may damage the barndoors. If you have any issues, remember you're covered by the 1 - Year Warranty.