What is NOT considered a proper "Do" for taking care of an oxygen mask?

Using paints to personalize the helmet is not considered a proper "Do" in taking care of an oxygen mask because it can compromise the integrity and effectiveness of the helmet and the associated equipment. Personalizing the helmet with paint can lead to several issues, such as interfering with the helmet's design, which is optimized for safety and performance. Additionally, certain paints can react negatively with the materials used in the helmet, potentially degrading them and reducing their protective capabilities.

In contrast, inspecting the mask before every flight, cleaning it at the end of the flying day, and carefully transporting the helmet assembly in a helmet bag are all proper practices. These actions ensure the equipment remains in good condition, is hygienic for use, and is protected from damage during transit, thus maintaining its functionality and safety features. It's essential to follow protocols that prioritize both personal safety and the operational integrity of aviation equipment.