Recently I've incorporated upholstery mill ends as weft into a rag rug. I was hoping to have the shaggy rug effect after weaving them, but I've found they aren't very secure within the warp. They actually fall out if tugged on too much, giving me concerns for machine washing. Is there a way to weave these mill ends so they 'stand up' within the rug in a more secure fashion ? The mill ends were sown into long remnants from the factory. After weaving them as weft, they tend to lay down within the warp. Any photos of the weaving technique would be appreciated. Thank you !