Suggested Cleaning of Comfort Vinyl Window Glass Systems: A simple application of Windex or any standard glass cleaner will work well. A (2) part generic vinegar & water mixture will also clean the glass. Suggested Cleaning of Comfort Vinyl Window System Sash Frames and Mainframes: The exterior surface of the window sash frames and the mainframe of the Comfort Vinyl Window System will be exposed to airborne dirt depending on atmospheric conditions which may be prevalent in the area. Rainfall may be adequate to remove surface dirt. In areas not accessible to rain, the vinyl window sash frames and mainframe can be washed periodically. If you desire to do a more thorough cleaning, or where dirt collection conditions occur, follow these simple instructions: For hard-to-remove dirt such as soot and grime, wipe the vinyl sash frame and main frame with a solution consisting of the following ingredients: 1/3 cup powdered detergent (Tide, Fab or the equivalent)2/3 cups household cleaner (Soilax, Spic & Span or the equivalent)1 Gallon water If mildew is a problem, in the area, prepare the solution above but substitute 1 quart liquid laundry bleach for 1 quart water. CAUTION: WHEN USING ANY OF THE ABOVE CHEMICAL CLEANING AGENTS, FOLLOW THE PRODUCT MANUFACTURER’S PRECAUTIONARY SAFETY RECOMMENTATIONS ON CONTAINER LABEL. PROTECT AGAINST CONTACT OF THE SOLUTION WITH EYES OR SKIN. GREATER CONCENTRATION MAY CAUSE DAMAGE TO THE VINYL WINDOW SASH FRAMES AND MAIN FRAME. This cleaning information is suggested in an effort to be of assistance; however, Manufacturer can assume no responsibility for results obtained which are dependent on the solution chemicals as prepared and method of application.