I have asthma and have been on ventolin and a range of preventers (and prednisone almost every time I have a cold because my lungs just can't cope) for around 25 years, no side affects or problems with my teeth.
Apart from what others have said this is some things I have done since I was a small child: I find Vicks rub works really well to sooth muscle aches/sore chests and helps with breathing, the nights I'm chesty or have a cold I sleep almost sitting up with pillows etc, make sure no triggers are around (for me it's dust so we can't have carpet in bedrooms and I need to sleep with the door open). A hot shower or just run the shower on hot and big deep breaths in the bathroom - the steam helps a lot with breathing. Also a vaporiser in her room before bedtime during the colder nights may help.
Could you try another spacer where it just has a mouth piece and she inhales it herself, it makes like a clicking noise when the valve opens and closes so maybe try to shift the focus on the noise?
Good luck xo
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