Using these motor brushes is easy. First, make sure your Dyson vacuum cleaner is turned off and unplugged. Then, carefully remove the old brushes from your vacuum's motor. Take out the new Qualtex carbon brushes and insert them into the motor in the same way the old ones were placed. Ensure they fit snugly. When it comes to maintenance, it's a good idea to check the brushes periodically. If you notice excessive wear or if the vacuum starts to perform poorly, it might be time to replace them. Also, keep the brush area clean to prevent any debris from affecting the brush's performance. And always remember to follow the safety instructions in your Dyson vacuum cleaner's user manual.