I would also like to know how the tuner cleaner worked out for the OP. I've been trying out an NH-T6 I used many years ago. It took about 10 miles for the screeching to start. I lubed with RZ-50 dry lubricant spray and that was good for about 4 miles, though I might not have got much in. Now I'm trying 3-in-1 oil. I didn't have this problem with the generator when I originally used it, so I assume that whatever lubricant was in it 30 years ago is gone now. Probably best to oil these things BEFORE putting them back into service.