 Here's how we built a reverse Roomba. Some Roombas just don't clean well at all. They zoom around in a randomized path until the battery dies and the floor is still messy. To solve this, we designed and printed a new Roomba Attachment. The new piece has a gear with holes and when it spins it'll progressively drop whatever we put inside. It replaces the dust collector that never seems to actually collect any dust. Add some dog treats and pop it in the back and now the dog will mop the floor with its tongue in return for treats. Roomba Improved