I get the good ones from glamor boutique.
They used to be the GL2000 (I think). Having had 6 or 7 pairs over the years many years.
I can tell you the typically last about 2 years with a lot of use.
I can track it to approximately the exact month. They've all lasted about the same time.
I glue them regularly and wear them.
Weekly that's how long they last.
I've accepted it as a cost of doing business. ��