No, "they" say not to use wd-40 on machines. DH wen to Home Depot and found the one I'd read about - PB blaster. He's into guns, so I use his tools and "stuff". The other day, I was trying to get some feed dogs out of a machine and didn't have room. I had bought some offset screwdrivers at harbor Freight, but the heads were too big for the screw. So, what did he have stashed in his room? A brand new set of Chapman screwdrivers! They are perfect for messing with sewing machines. The feed dogs came right out.
bkay