With the Bissell CrossWave Cordless Max and the carpet brush roll you can clean your carpets optimally. It is great for cleaning carpets after a small accident of your pets or for a general cleaning. The bristles break up stubborn dirt while the strong suction of the CrossWave Cordless Max sucks the dirt into the unit.Once you've finished cleaning with your CrossWave Cordless Max, cleaning the carpet brush roll is a breeze with the CrossWave Cordless Max's self-cleaning process. This process spins the roller as you flush clean water through the machine, so it gets cleaned but also dries faster. Remember to replace your brush roll every 6 months so you can be sure your floors are getting the best cleaning.