Using the Aardwolf Automatic Slab Lifter AL50A is a breeze. First, make sure the slab's thickness is within the grip range of the model you're using. Then, place the lifter on the slab. Thanks to the auto - lock mechanism, it will automatically grip the slab when you start to lift. When you want to set the slab down, it will release automatically. Safety is key. Always check the working load limit before using the lifter. Don't try to lift slabs that exceed the specified weight. And keep in mind that only a small movement is needed to engage the grip. As for maintenance, regularly clean the lifter to remove any dirt or debris. Check the clamps for any signs of wear and tear. If you notice any issues, it's best to have it inspected or repaired by a professional.