How do I empty the bin correctly?

Hold the machine over a bin pointing downwards, then firmly push the red bin release button — the bin will slide down and the bin base will open. Note that the bin base will not open if the red bin release button is not pushed down all the way. You should empty the bin as soon as dirt reaches the MAX level, as overfilling may affect performance and lead to inaccurate particle graph readings. (Page 7)