Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Prazi Putty Chaser

I purchased this item hoping it would work for very old windows. My wife has an art business and she sells about 200 antique windows a year. I've been cleaning out the glazing with a heat gun and chisle for years and was looking for a easier way so I thoughtI would try the putty chaser but the glazing is just to hard for the putty chasier.