In order to maintain the best quality from a Dyson vacuum, Dyson recommends cleaning the vacuum filter every three months and emptying the clear bin of dust once it reaches the max mark. Step-by-step instructions on how to clean the filter and clear bin are available at the Dyson website.
The first step in cleaning a Dyson filter is to remove the filters from the machine according to the specific instructions for the vacuum model. To wash the filters, rinse with cold water until the water runs clear. Do not use detergents or dish soap, and do not place the filters in the dishwasher. To dry the filter, lay it in a warm place for at least 24 hours until it is completely dry. Do not dry the filter in a dryer or microwave oven. According to the machine's instructions, put the filters back on the vacuum machine making sure that they are both locked on. To ensure that the filters are on properly, test run the machine.
To clean the clear bin of dust once it reaches the max mark, remove the bin from the vacuum according to the machine's instructions. Shake the clear bin over a trash can and gently tap it to remove all dust. Make sure the bin is firmly back in place before using the vacuum.