I’ve been down the same path as you.
It’s been about6? years for me.
Back then the fill-in audi put me in Power Domes without any explanation (except he also said I might need more powerful=new hearing aids.) I lasted 2 days. He put me in large with no alternate sizes.
Now I’m back in Power Domes and have been for about 3? months. My hearing instrument specialist has me in large in the Left ear and medium in the Right ear. (Kind of a pain; hard to remember.)
Some days are good; some aren’t so good. I had severe trouble with my very first hearing aid which was a Widex in the ear device. It actually hurt to wear when they remade it. Then I would take it out. Before then every time I ate and chewed it squealed on me. I’m very reluctant to go manufactured
My conclusion–these little domes are a horrible invention and pain in a tender spot. So are the new wax guards that Phonak is using now. I’ve optimized both of mine…and I’m making do on good days. On bad days I wonder why hearing aid companies make such junk.
You have a bunch of symptoms. My impression…if they squeal they’re too small. Or the dome is falling back out of your ear. I’ve always used to use sports locks on my hearing aids. Maybe they would help you by keeping the receiver/dome in the ear where it belongs. And maybe you need an assortment of sizes to see what size you really need. Finally, my audi who dispensed my Phonak Audeo Paradise P90R’s suggested I take the dome with the two tiny holes in it and cut it with scissors on the silicone flap. So I would take the next larger size and snip it and use that…if I wanted to play.
Don’t forget that changing the domes affects your setup. And that’s in never-never land where we can’t adjust it ourselves, but it requires a setup change by the audi.
Good luck.