Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't Last Long - Replacing with Porter Cable

Won't start after about fifteen uses. After reading other reviews, I asume the switch failed. Took it apart to see if something obvious was wrong, like a burned wire. This I could repair. Saw nothing obvious but the motor and insides were filled with sawdust. What kind of design is this for a wood working tool that allows it to be ruined by saw dust?