Ive had asthma for over 30 years controlled most of time with symbicort salbutamol montelucast etc. I'm using my nebuliser more often as bad bouts of extreme tightness are more frequent. This latest spell of high pollen has really knocked me for 6 with another 10 days of prednisalone. I am fine with pet hair no problem. Has anyone tried air purifiers? Have they worked for you?