I personally use a nasal spray made with CDS 3000 3ml/30ml (distilled water).
Here's what Jim says about the frequency of dosing of the breathing protocol - from his latest book:
"You will quickly learn to use a few breaths two or three times a day,
but only very slowly. I can’t emphasize enough that you must go
slowly, working up to several breaths in the morning and in the
evening. Gradually, your lungs will begin to heal. Keep in mind that
this technique is using chlorine dioxide at just about 100% strength.
The fumes coming off the bottom of that cup are 100% chlorine
dioxide, but they do mix with a small amount of air on the way up."
jhbooks.org/
I don't recall him recommending it for plugged sinuses, but rather lung infections.