Sewing hack.
I have been seeing a lot of videos and about the metal feet building up static and that static causes the ends of the two fabrics to not come out even after sewing. The teflon feet available get grooves on the bottom from the feed dogs if used constantly but seem to work. They were promoting/talking about a set of static free feet made to last for about $100. I have a can of static free spray so I sprayed the bottom of my piecing foot. Will it make a difference? I don't know. Any thoughts about the static build up on the metal feet?