It depends, but usually you don’t need to empty the dust bin after each use. Many robot vacuums can be empty in their docking station, so you don’t have to clean the actual robot.
Self-emptying robot vacuums can collect anywhere from 30 to 60 days worth of dust and allergens, making cleaning a breeze.
Some robot vacuums don’t offer self-emptying features, but they’re also cheaper. Depending on how much dust and pet hair is on your floors, you may want to use some tools before emptying the bin.
It is worth reading the product description, as it will state whether it offers a self-cleaning option along with how long the wine lasts between sessions.