Recently we noticed that LA's breathing treatments were taking longer and longer. I checked her compressor's air filter--it was good. I changed out the tubing, etc. Still not fixed. I emailed the maker, Pari, and asked for advice. Without blinking an eye, they overnighted us a new compressor and sent a prepaid mailer to return the old one.
Rarely does a company's customer service impress me...but they sure did!!