With the Grosson irrigator, does it have any instructions on the proper
position to hold the head so that the danger to flooding the Eustachian
Tubes is minimized? To me, the most dangerous positions to irrigate would be
with the face up, or leaning back, but I am not an expert.

I have done a lot of research on problems with Eustachian Tube flooding, and
I have yet to find a solution. Some have had some success by having tubes
put into their eardrum, to help with the draining.

I've been successfully flooding my sinuses and nasal passages for over 2.5
years, with a diluted mixture of 3% hydrogen peroxide, baking soda and
kosher salt, in order to treat my sinusitis. In my documentation, I've got
specific warnings and suggestions about the position of the head, in order
to protect the Eustachian Tubes.

Good luck. I hope that, by the time you read this note, your middle ear has
been able to drain somewhat.