This is, so far, the most reliable portable nebulizer i have found, selling for $60 (can use plugged in or via AA batteries). It works well for nebulizing 50% DMSO/50% Holy water (ozonate charcoal in water). I also throw a Palo santo stick in there and a speck of naltrexone but that's up to you. Sniff the vapors and hold deeply. Cures asthma instantly, cleans out your sinuses, lungs, and brain. Best cleanest high I have gotten from anything and super healthy. DMSO is the only substance currently known to detoxify PFAS (forever chemicals). You can buy 4oz glass jar of DMSO on Amazon from Bell Chemical for $10. It has over 300 medical uses. Read the books on it.

If you have any respiratory infection, nebulize 1-3% hydrogen peroxide (preferably food grade, but any will work). Within 1-3 hours of doing this your infection is generally gone.