In my experience the clicking sound are parasites (head).
I put fresh garlic cloves (peeled, cut long ways) in my ears, long enough, and snug enough to be easily pulled out I have great results with a high grade olive oil infused with tea tree, lavender, or frankincense too. Any essential oil will do.
Whenever I hear the clicking I put a drop of oil, and/or fresh garlic in my ears. The clicking stops pronto. When I first started this protocol, 10+ intact parasites dropped from my ears over 5 days, it was gross. I'll try and post photos. I douche my nose every morning with warm pink Himalayan salt too. I put Colloidal Silver in my nose, and eyes a few times a week. I've put wheatgrass in my eyes, and WOW, tons of parasites, they feel like sand in my eye, they burn, and after 'watering' the wheatgrass captured tiny parasites, sometimes it would stretch under my eye, only visible due to the wheatgrass stain.
Wheatgrass is actually good for your eyes, tons of vitamins, and oxygen, but don't do too many drops, the die off will block your ears for a day or two. Not for the feint of heart, it does burn.
I felt having protocols for my eye, nose, and ears were necessary in conjunction, oral, and the down under protocols as they move around.
I used to be a huge sushi eater, and let my dogs sleep in my bed. Despite having a super healthy diet, Genetically-Modified-Organisms /Gluten Free etc, my parasites were out of control. I can't believe the amount removed after 10 months from my tiny frame. And I didn't even feel ill. In hindsight the burden was so heavy, and I didn't realize it. Frog in heating water syndrome.