This, or merging the verts over to your main bedsheet geo, and then into the geometry itself to essentially "make it dissappear" should hopefully do the trick. I have seen some rogue geo when using deformers and nCloth type tools, while usually user error at some point as said before, its also just a set of tools that can…
So here is my model (bed sheets). I have an extra face right below it and I cannot delete it. I made it bigger for you guys but at first it was really small. I have no idea how that geometry got there. I used nCloth for the bed sheets and it was my first time using it, maybe that's where I screwed up. I tried to separate…