A printhead maintenance system for maintaining a printhead in an operable condition is provided. The processes provide a good yield and a good purity of the final product and provide a controllable reaction. The driving circuit applies a reset potential to the pixels in the group before executing the signal writing operation. A plurality of first contact tips are located in the through holes adjacent the first surface and a plurality of second contact tips are located in the through holes adjacent the second surface. Buffered solutions containing one or more oligosaccharide-containing compositions and methods of making and using the same are also described.