Instruct: Classify the given Amazon review into its appropriate rating category
Query: Stains chalkboard

I love the colors and how neat they came out when writing. It was amazing not having to worry about dust all over. The only thing I was disappointed about was that they didn’t wipe off so easy and stained my chalkboard and the labels that come with the markers. I had to stop using them unless it was going to be permanent on the chalk board.