Care & Maintenance Cleaning the Dust Compartment, Pre-filter, and Cyclone Assembly 2. Press the dust compartment bottom cover release button, then empty the contents. 1. The vacuum cleaner's cleaning ability will be reduced if the dust compartment is filled to the "MAX" mark. To regain performance, empty the dust compartment in a timely manner. Before emptying the compartment, make sure the vacuum cleaner is disconnected from the power, and do not press its power button. 14