Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Toxic carbon steel.

I got an Olde Thompson salt grinder. After some weeks using it, the salt started coming out of the grinder with an unappetizing, suspicious green color. First I thought there was a problem with the sea salt but then I realized that the grinding mechanism was releasing that green material. Scratching the supposedly steel grinder component, it tears apart the crud. The mechanism is crumbling in green dust. I instantly discarded the whole grinder because of how toxic that carbon steel could be. I am really dissappointed with the Olde Thompson grinder.