I was having the same problem and got some advice from t.lapinski to drill out the holes and put stainless bolts in there with locknuts and washers. I started wearing them in May, and they finally have worn out and need replacing right now. The korker studs are a joke and lasted only a couple outings before I was slipping all over the place.
The bolts work like brand new korker spikes but take forever to wear out. I have put in hundreds upon hundreds of hours on these spikes this year and they finally just need to be replaced now for the fall run
The only draw back is that they are kinda of heavy.... but everything has a trade off.