uPVC frames should be cleaned at periodic intervals to maintain their original appearance.
The frequency depends upon the geographical location and or 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. If the surface is excessively dirty, it should be cleaned as above. If any unsightly stains remain, then a mild household non-scouring cream should be applied to remove the stains. Abrasive materials should not be used for any cleaning purpose because of scratching of the surface. Especially avoid the use of steel wool pads, as these might cause permanent stains.