Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Oily Smell and Residue

The yoga wool blankets smelled very strongly of "machine oil" that no amount of airing would remove. There was an oily residue left on my hands and one of the blankets shed so badly that if you had used it you would be covered with large purple fluff from head to toe. Also had trouble with my return until Amazon stepped in to help.