I was in Home Depot today and walked by the garage door display. There was a package of three small grease tubes from Genie that caught my eye. It said something like the only thing you should use on the screw drive.
I've had a Genie screw drive (which was installed professionally) for 5 years that has made a racket from day one.
I thought, what the heck, and bought the three tiny tubes (one for each application it said) for $5.
I came home and ran the opener with the door disconnected and wiped off as much grease as I could.
Then I applied one Genie tube, ran it about twenty times up and down, wiped off excess, applied second tube, up and down again, then wiped off excess.
The thing is now 10X quieter.
I was ready to buy a new opener. The grease was probably 100x overpriced in these tiny tubes, but it was worth it.