A bowling ball maintenance device performs a de-oiling process on bowling balls having porous surfaces. The maintenance device may comprise a container sized to store at least one bowling ball within the container and structured to receive the bowling ball. A heating element is structured to warm an internal environment of the container at least to a level at which oil that may have accumulated in the pores of the ball begins to flow out of the pores. Embodiments also include a ball support cup within the container that is structured to contain the oil that has flowed out of the pores of the ball. Depending on the embodiment, the ball support cup may include three or more ball support extensions structured to support the ball in a stationary position over a height of the walls or edges of the ball support cup during operation of the maintenance device.