All parts (except for the motor base) are dishwasher safe and can also be washed by hand.
The bowl should be placed completely upside down in the dishwasher, then allowed to drain the right way up on your draining board before being put back on its base.
That way, any water that has found its way inside the double wall will run out through the hole beneath the handle intended for that purpose.
Check that the underside of the bowl is dry before putting it back on its base.