I recently made one for my DH and clipped every seam. Using the spring-loaded scissors helped A LOT.
We have a front-loader washer and I didn't want to mess it up with threads and lint (as there is a ton), so I used a chenille brush and a spritz bottle with water to get the seams ragged. Did that while watching TV. I was amazed at how much came out of the seams that would have been in the washer and could have clogged things up. It was worth the effort.