I bought the Dirt Devil Purpose for Pets upright in April of this year.  In June, the ends of the roller disintegrated into tiny pieces.  I contacted Dirt Devil about getting a new roller.  I was told that the roller was not covered under warranty and that I would need to purchase a new one.  I was also told that I needed to remove the roller each time I vacuumed and clean it after every use!  I had cleaned it once since I purchased it, and let me tell you, it is so difficult to remove to clean!  You would think that if Dirt Devil makes a roller that needs to be cleaned after every use,...