My father in law has 4. 3 are the same size and one is slightly smaller. We have been advised that all should be changed once a month. But given that on is smaller this is changed every 3 weeks and one of the others is used twice as much so gets changed fortnightly!
If you are 83, father in law is, you get easily lost. I have a spreadsheet with change dates on it and let him manage his inhalers. But every time a change date arrives he swears blind he doesn't need to change them or doesn't think they are empty/low.
He believes that if there is something coming out the end of the inhaler he can keep using it. I believe that there is a lot of propellant as well as drug in an inhaler?
But he does have a flare up if they are not changed!! He fails to see the connection as usual!!
So how often do you change your inhalers? and how many do you use?
I seem to be moaning a lot don't I, sorry for that!!