Can WINBOT X clean any type of dirt or residue? Can WINBOT X be used on greasy windows?

WINBOTX is designed for routine maintenance rather than first-time or heavy-duty cleaning. If your glass has a thick layer of dirt on it you should clean an area of the glass larger than WINBOT, let the glass dry and place WINBOT there, or clean the entire window first and use WINBOT for maintenance cleaning. WINBOT X is capable of cleaning most water based dirt from glass, but cannot maintain a secure suction seal on windows with grease build-up.