If you notice that your ionvac DeskVac is starting to sound louder than usual, then the motor may be overheating, or the vacuum may be reaching the end of its lifespan. Try cleaning the vacuum and its dustbin thoroughly, and recharge the vacuum back up to full power. Let it rest for a few hours before using it again. Do not disassemble or modify this device in any way. This may damage the vacuum. Instead, contact Customer Service for the next steps to take.