Using the BNFTSPN Stake Puller is easy. First, place the head of the tool against the stake you want to remove. Then, lift the handles. As you do this, the rollers on the tool will grip the stake. You can then rotate the stake back and forth to break the tension around it. Once the tension is broken, use your leg muscles to pull the stake out of the ground. When using the duplex nail - pulling attachment, just position it correctly on the nail and pull. As for maintenance, after each use, clean the tool to remove any dirt or debris. Check the rollers and the attachment regularly for any signs of wear and tear. If something seems loose or damaged, get it fixed or replaced right away. Also, store the tool in a dry place to prevent rusting.