Sliding doors have become very popular because of their beauty and reliability. However, a damaged sliding door can be a big problem. To fix this door, you will need materials like replacement rollers, silicone lubricant and premium replacement screen door. Start by using s screwdriver to raise or lower the door on the track until it balances, then remove the stop molding and lift the door out of the track one edge at a time. Start the repair by replacing the rollers, and finish by replacing the balky sliding screen door with the premium screen door.