Board Thread:Questions and Answers/@comment-33375721-20180415094748/@comment-5553481-20180415170615

As a cleaner meant both materialising and moving objects. As for sustainability, you usually sustain servitors for whatever their task is and that's it, but yes, you can also make them self-sustaining, which in turn means it's going to be working with you, not for you because of energy dependence, so be nice.