Koliko često treba mijenjati maske s kisikom?

Keep it clean, change it weekly, or whenever it becomes contaminated. In case of discomfort or emergency, if you use an oxygen mask for a long time, you need to soak it with disinfectant once a day. You can't wash it with hot water. You can usually wash it with cold water. After all, it is a special material and needs to be paid attention to. There is no problem, there is damage and there is a possibility of rupture. Oxygen masks are now disposable. Do not use it multiple times. If economic conditions are limited, you can use it after disinfection.