I suppose you could dip your package in cold water before putting the Mag Volt on 😛
In all seriousness, though, I’ve been having the same problem, even though I know I got the right size. I’d suggest getting a resize kit sent when they’re available, and making sure that it’s sized correctly, and then gluing the nipples in place. I’m hoping that SM will send one out to those who have been having issues with this. I can’t wear mine, now, due to the problem. I do wonder if there’s a fatigue issue cropping up in the tubing, or perhaps the retaining ring itself. I’m sure some of us are putting a fair bit of strain on those tiny parts.
Happy stealthing, guys 🙂