What action is necessary to prevent damage to a waffle baker?

To prevent damage to a waffle baker, keeping it open when not in use is the most effective choice. This action allows for proper air circulation, which helps to prevent moisture buildup that can lead to rust and corrosion on the cooking surfaces. When a waffle baker is closed, any residual moisture or batter can create a damp environment inside, potentially causing damage or affecting the overall functionality of the appliance over time. This practice also helps maintain the integrity of the non-stick surfaces by reducing the likelihood of sticking or the formation of residue.