That's really intriguing, Helen. I would be interested to try the experiment of using an ear candle on a glass vial and see what happens. I had it done on myself, and found it to be good, and the person who did it for me was a totally sincere and trustworthy individual whom I have known for many years. I don't know if it is a valid treatment method or not for absolute certain, but I can assure you that she is not consciously trying to cheat anyone. She simply wouldn't, period. She's not like that.
The professional medical and pharmaceutical community is, in my experience, always against any treatment method they didn't think of themselves. Accordingly, they are against ear candling. They're protecting their professional turf. There's money at stake. They have a natural desire to discredit whatever they do not themselves control or profit from in the field of health.
It's a similar attitude to that which powerful churches have historically held against spiritual ideas or practices outside of their own dogma.
In any case, I will see if we can set up an ear candling experiment with a glass vial, like you describe. I think it would have to be an open glass tube, though. The ear canal is not a sealed channel, with an opening only at one end...it goes through to the nasal area as far as I know, so the air is not trapped in there, but can pass completely through, if the passage is not blocked with foreign material (as can happen with an ear infection, etc.). I don't think the ear candling would work unless the air could pass through from the nostril passages and then out the ear, like through a chimney. That's how it works. You cannot have a working chimney with no draft vent open at the lower end.