Fellow Esthy's - Help!

I have been using my high frequency machine for a many years but lately I can "feel" the current in my machine more than usual (I always have a little...bit). And my glove I use when operating the machine is getting discolored. Yikes! Bottom line - I am freaked out to continue using.

I need a new machine desperately but have no idea what to get. Do you guys have a machine you like? And/Or a place you got yours from that you recommend? I only need a high frequency unit not one with galvanic. 

Any thoughts would be extremely helpful!

J.L.