Cure? I’m glad you asked. After that, they were stretched enough for me to be able to remove and put back on very quickly. The first pair I ordered was a half size too big and had to exchange them. Maybe the forcing that with a small piece of metal?) Next is the instructions arent clear on changing the decibel level. The sound quality is very good. I bought these as a Christmas gift. I went to the next size and they were perfect 0 hub for years and when my wife and I had to begin working from home during Covid 19 I looked for a new one because we had to set up 2 offices, they were no longer available. That was my first impression after using them. In fact, once I’d unboxed and examined them, the first thing I did was plug them in and charge them up.