[Elecraft] K3 - MH2 mic switch mechanical noise

[Bill]

My MH2 mic, about 9 months old, creates a spike when keyed and unkeyed. 
It is a mechanical problem within the mic, as other mics do not do this. 
That said, has anyone got a cure for this? I have tried lubricating the 
cheap switch and all places where there is movement along the PTT 
mechanism. An improvement - but, not a cure.

I have an MC-60 which works great and brings no mechanical noise with 
it, however, I prefer a hand-mic, so I am open to suggestions.

Thanks,

Bill W2BLC