How often do I need to change the air filter on my Microlife NEB410 Children's Nebuliser?

[SanHope]

To keep your Microlife NEB410 Children's Nebuliser running smoothly, you should replace the air filter. According to the user manual, the air filter (labeled as AM) needs changing roughly every 200 operating hours or once a year, assuming regular use. For best results, inspect the air filter every 10 to 12 treatments. If it looks grey, brown, or wet, it's time for a replacement. Remember, never try to clean and reuse the filter; always use a new, genuine Microlife air filter. Also, never service or maintain the air filter while the nebulizer is in use.