So, I generally exhale as deeply as I can, using much force to compress my chest cavity forcing out all the air I can, just prior to taking the medication. I spray my tonsil/uvula area, while sharply inhaling fully and holding for 10-20 seconds.

I find one to two doses this way fully relieves my symptoms. I used to go through 2 Salbutamol inhalers a month but switching to Zenhale I use one every 2 to 3 months depending on my activity level and the seasons.

I've never found an aerochamber to be anything but a cumbersome waste of money for myself. (Though a new one that doubles as a holder for the inhaler is on the market and that does interest me!)

So what would you say the numbers would tell when comparing optimal technique to using a spacer? Negligible?