Zoom Extents and UFOs

How do I find to delete unidentified far-flung objects (UFOs) when I Zoom Extents and my model basically disappears? I’ve tried selecting my model then inverting the selection to find random the far flung items to delete but that does not seem to work. When this happens Zoom Extents effectively becomes non-functioning.
Thanks.

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Sometimes I manage it by zooming to extents, selecting all (ctrl-a) and deselecting everything near the origin with a window selection.

RescueMyModel plugin