The main objective of the Mid to High fidelity prototype was building a proper casing for the squeeze bottle and squeezing mechanism and training the Wekinator for detecting sneezes.
Cold mist on cold glass =/= condensation
Realistically, the glass pane mists up when hot steam condenses on its surface. But is this a realistic project to continue pursuing? Probably not. Perhaps in a controlled room/space/box where the glass is always chilled and the steam is constantly billowing. However, this module is called Interactive Devices, and this requires a device rather than a space.