Instruct: Classify a review into positive or negative sentiment.
Query: Works well about 4 or 5 times

I have purchased 10 or 15 of these devices over the last 6 years. They are basically disposable like a razor after a few uses. I don't know what happens to them...they just stop working.I use them mainly for nostril hair and specifically for the thickest hairiest area just inside the front of my nose. When they're new they work great and I've not found any other grooming device that can do as fine of a job. However after several uses they just stop working. I've tried new batteries, but that doesn't seem to be what fails. I can pop out the old battery and put it back in and sometimes the device will start working again. Banging them on the countertop sometimes gets them to rev up again, but eventually they just stop working.