Using the BNR1839 Drywall Sander is quite simple. First, connect the vacuum hose to the sander to keep the work area dust - free. Decide whether you need the round or triangle sanding head. The round head is great for large, flat areas, while the triangle head is ideal for edges and tight spots. Adjust the length of the tool using the built - in extensions according to your needs. When sanding, move the sander smoothly across the surface. Remember to always work in a well - ventilated area. For maintenance, clean the dust - collection area regularly to keep the sander working efficiently. Also, check the sanding pads periodically and replace them when they are worn out. Store the sander in a dry place to prevent damage.