Instruct: Classify a given customer review as either counterfactual or not counterfactual.
Query: I have had these for atleast A year now and I hardly ever use them anymore they get dirty fast and dont keep the dust away very well I had some type of cable break inside one of them within the forst month or two cleaning them is easy but you have to do it too often and you have to replace the cores yearly which is ridicoulus in itself.