tools:
Boric Acid powder
powder atomizer
Boric Acid kills the mites if you can hit them square... but it's not easy.
I found out that if they don't see you... i.e. they are in your panties... you can puff the powder at them through the fabric. The small diameter pipe makes it easy to pinpoint where the mite is... and puff...
Now, if you have a lot of mites, like I did earlier tonight, it may take an hour to have peace and quiet... but it's worth it. It takes practice. you stay lying in bed, direct the pipe and push the bulb... easy peasy and effective.