What is the best lung cleaning device?

I'm curious, what exactly do you mean by "lung cleaning device"? Are you referring to a medical device used to treat respiratory conditions or something more akin to an air purifier? If it's the former, I'd recommend consulting with a medical professional to determine the most appropriate treatment for your specific condition. On the other hand, if you're looking for an air purifier or similar device to improve indoor air quality, there are a variety of options available, ranging from portable units to whole-house systems. Ultimately, the best choice will depend on your specific needs and budget.