I know most of you old timers already know this, but I just had to retrieve a part so I thought I'd post this.
If you lose a part to the Carpet Monster and simply can't find it, here's what to do. Source a piece of stocking or panty hose from your SO. Rubber band it over the end of the vacuum hose. Sweep the vacuum everywhere, and you'll find the part stuck to the stocking on the end of the hose.