Receiver comes out while eating

I use concha locks/retention tails/sports locks (different names for the same device) as shown in the photo provided by @tenkan. I also have to have my domes exactly the right size, which is iffy - too big or too small results in a receiver backed into the tragus of my right ear. My right ear canal is smaller than my left, so it’s got the greater tendency to let the receiver “back out” of my ear. I’m using medium vented domes with a tiny customization (a scissors snip in the side of the midpoint of each dome) to provide a snug fit without additional venting effect. I’m considering custom molds for both ears, but am concerned about potential material reaction so trying to decide. If my current method continues to be effective, I may just stick with what I’m doing now.

If you get a chance, would you mind posting a pic of how you have modified your domes? I am intrigued.

Yes, you said you had a tiny customization in the side of your domes.

I took a tiny pair of scissors intended for trimming a mustache. I made a tiny (probably 1/32nd of an inch) snip, midway down each dome, horizontally. So tiny it doesn’t show adequately on a photo (I tried ). It is only to make the medium vented domes “squish” a little smaller. Small vented domes are too small. It has no appreciable effect on sound quality, but allows me to place the receivers more deeply and securely into my ear canals. I use the retention “tails” as a way to pull the receivers out of my ears, so as not to damage the wires.

Just want to say thank you AttilaDaPun for the two snips in the dome. It worked for me as my left ear canal is just a little smaller than the right. It would back out but now it doesn’t. It also got a little painful after all day but not now.

Thanks for your reply! I’ll keep a 2nd snip in mind, in case just 1 doesn’t maintain the receiver where I want it.