Sometimes, a lot of the things that go wrong with machinery are down to user error. We’ve all been there: you didn’t download the right app, you selected the wrong program on the washing machine, you forgot to put the lid on the blender.
Or, in this case, you forget to make sure that all the necessary parts of the vacuum are connected. I’m not entirely sure how she hasn’t noticed, to be honest. The only possible explanation I can come up with is that she’s got her earbuds in playing musicals at full volume. Whatever’s going on, this room isn’t going to be any cleaner any time soon.