Using the LittleBits roller switch is easy. First, place it where you want an object to trigger it. When something moves past the wheel on the lever, the switch will activate. If you want it to work the other way around, flip the mode switch so it turns off when you push the lever in. For example, you can pair it with an LED to make a fridge light. When you open the fridge (the lever is released), the light turns on, and when you close it (the lever is pushed in), the light turns off. As for maintenance, keep it clean and dry. Avoid getting it wet or dirty as this could affect its performance. And be gentle when handling the lever and the mode switch to prevent any damage.