Using the DeWalt DWA5840 floor scraper is easy. First, make sure the scraper is firmly attached to your power tool. Then, place the wide blade on the surface where you want to remove materials like tiles or adhesives. Start the tool and move the scraper slowly across the area. When using it, always wear safety goggles and gloves to protect yourself from flying debris. As for maintenance, after each use, clean the blade with a brush to remove any debris. Check the blade regularly for wear and replace it when it gets too dull. Also, make sure to keep all the replaceable parts in good condition. If you notice any loose parts, tighten them up right away. This way, your floor scraper will serve you well for a long time.