In general the maintenance of uPVC windows requires only that they are washed, and that the hardware suppliers' instructions should be followed if any periodic lubrication of mechanism is required.
uPVC is particularly resistant to both marine and industrially polluted environments. Certain solvents, e.g.. Ketones and chlorinated hydrocarbons will affect the surface of the uPVC and should not be used.
uPVC windows should be cleaned at periodic intervals to maintain their original appearance. The frequency depends upon the ambient atmosphere but as a general rule the frames should be cleaned whenever the glass is cleaned.
The best method of cleaning is to use a clean cloth and a solution of detergent, diluted to the normal concentration for washing-up. It is important to 'flood' the uPVC frame, and at no time rub the dirt with a dry or semi-dry cloth, as this might lead to micro-scratching of the surface.
If a surface has been allowed to become excessively dirty, it should be cleaned as recommended above. If any unsightly stains remain, they should be removed using a mild household non-scouring cream, followed by washing. Abrasive materials should not be used for any cleaning purposes as these can cause micro-scratching of the surface. Especially avoid the use of steel wool pads, as they might cause permanent stains.