Is there anyway to know if your asthma inhaler is expired without checking the dates?

I was wondering if there will be any change that tells you your puffer is expired. I am using my second salbutamol inhaler and I feel like the taste of the inhaler in different from what I had!!! I mean when I am exhaling after using my inhaler, I usually feel a weird taste but not with this new inhaler. Could it be expired?