Using this ADJ EP Mini Fresnel Lens is a breeze. First, make sure your Encore Profile Mini (either WW or Color) is turned off. Attach the lens securely to your device. When using the manual zoom feature, simply adjust it to get the focus and light dispersion you want. For the best results, start with a rough estimate of your desired zoom angle and then fine - tune it. When installing, use the eyelet on the lens barrel to attach a safety cable to prevent any accidental falls. As for maintenance, keep the lens clean. You can use a soft, dry cloth to wipe away dust and debris. Avoid using harsh chemicals as they may damage the lens. If you notice any issues with the zoom function or the lens seems loose, stop using it and contact customer support.