Recently I’ve been using the AZLA SednaEarfit Max Standards with my U12t. They’re very comfortable since they’re made of a pretty soft and grippy silicone. They have built-in wax guards which also help prevent the IEM nozzles from going too far through the ear tip bore.

Dang, sorry to hear that’s happening to your U12t. I purchased mine second-hand last month, but they were originally purchased in August 2019. These are still holding up really well and look and sound excellent to this day.