not sure about the fix but sometimes I forget about the safety feature they will not allow you to lock the spindle without turning the power switch off.....
I was like why will it not lock for like 10 min and then it hit me I had not flipped the switch
if it is in warranty then I guess the service center should get a call but if not I would not think it would be hard to take it apart and clean it and maybe that would take care of it
I do love my Triton