Gone in 50 seconds:

This movie, made by an extraordinary woman named Toni, who lives in Las Vegas, shows an active demodex mite taken fresh from her face being killed in 50 seconds by a miniscule amount of dry mustard powder mixed with a tiny amount of water.

Note that 100% strengths of tea tree oil, alcohol, caraway oil, or dill weed oil will take 15 minutes to kill a mite.

Toni discovered this through seven years of trial and error, experimenting on herself, looking for something to eradicate her own demodex infestation.

Her persistence paid off.

Note that this was an early version of Toni's experiment and the mustard hasn't been fully mixed with the water.

Finer, more homogenous mixes result in an instant kill.