james croft
Contributor
Ronbeau said exactly what I was going to say. I heard this from a DAN physician at a public safety diver seminar a 10 years ago. What he also said was that it was important to keep your head tilted for 10 minutes for each side otherwise it was not effective. That is hard to do and most folks aren't going to take that much time, but if you are prone to ear infections make sure you try it for a full 10 minutes each side.