By coincidence, I am having this problem with my KS5s. When I push the receiver fully into the canal, my volume and clarity goes way up, but they won’t stay there. They soon insist on backing part way out of my ear canal, requiring me to push my volume up about 3 clicks. I am leaning towards getting molds. Of course I have had the KS5s for several years, but in all other respects they seem to serve me well, The Costco hearing specialist quoted me $80 for custom molds.
I am tempted to try the homemade molds just to get an idea whether I would adjust well to molds. I used to wear custom-ordered molds years ago on a pair of Phonaks, but when I got the KS5s I was told I didn’t need them and to stick with the standard dispensed domes.
We’ve been down the road many times about getting the “tail” coiled correctly inside the shell of my ears and I have been assured often that my tails are correctly coiled and placed, but it seems that the tails just are not strong enough to resist my canals’ desire to partially eject the receivers, so that they end up partway in and partway out.
But after carefully reading this thread on Hearing Tracker all the way down to its end:
I think I will forget the DIY stuff and go straight for the $80 molds at Costco.