This is a different way to keep the lint out of the plumbing. I saw a video of a man who made a rag quilt and took it outside, taped it down to a board, then used an electric weed whacker to fray the seams. He said not to use a gas weed whacker because they are more powerful and would damage the quilt. After he finished with the whacker he picked it up and shook it well. It looked like it did a good job. I wish I could remember who it was.