The invention includes devices, arrangements and methods for treating an endoscope after use to prevent adhesion of bioburden on internal walls of a lumen of the endoscope. After treatment, the device is stored in the treated condition until cleaning. The device is configured to selectively deliver cleaning solution to the endoscope. The device can be a circulating embodiment having a pump. A filter can be provided to filter debris during circulation. The device can be a non-circulating embodiment having a hydrophobic filter for release of air. Fittings are provided on the device components to selectively attach the device to endoscopes.
