Waste
From WikiManual
Waste is a byproduct of energy consumption. Waste has yet to be standardized, so some actions produce disproptortionately more waste than others.
When waste levels in a bot become greater than waste threshold (set in options panel) the bot will undergo 'alzheimers', where random values are placed in random locations in the bots memory, causing many undesirable effects. The most common is for the bot to store 1 to .fixed, becoming stuck in place.
Waste can be removed either through a -4 shot or through .sharewaste.