Witric Power - Witricity Explained

When I leave my mouse alone for a while, the mouse pointer starts slowly moving in any random direction, as if some invisible force is pushing it around. However, there is no one at the computer. Is this a problem in my mouse, or a problem with my mouse receiver (because it is wireless) translating the mouse's movements on the screen? It may not seem like much, but when I put my computer on standby, it always wakes up, thereby wasting unnecessary energy. Answers, anyone?
I changed my batteries a few days ago... Witricity: witric power.

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