Instruct: Classify a given review into positive or negative sentiment.
Query: brushhead not secure, presents problems

my dryer vent exits the laundry room through the ceiling behind the drywall.The brush was difficult to use around vent elbows as the flexible pole was too flexible. After the head fell off in the vent, I had to cut-away drywall and wrestle the existing ductwork. I removed insulation and some of the ductwork and retrieved the brush head. I cleared out more lint with my hand than I did with the brush.Good concept, but cost me much more in time, energy and $$$ when the thing broke. If you have simpler, straight through (no bends) ductwork, this might be a reasonable solution.