The plastic parts of the windows are easy to clean thanks to the smooth surface.

Frames and sashes of both plastic and aluminum windows and doors have a smooth surface that is easy to clean and maintain. Remove normal dirt from dust or rain with mild detergents or detergent and warm water, using a soft cloth.
Materials containing abrasives, sand or rough particles are unsuitable — they can permanently scratch the surface. Clean contamination during assembly or operation (e.g. grease from fittings) with conventional cleaning products without aggressive ingredients.
To clean must not use gasoline, diluents, intranasols, acids, chlorine, SAVOY or other aggressive products — they can damage the surface of the frames, disrupt the protective layers and cause corrosion of fittings.
Clean ornamental stained glass in door fillers only lukewarm water without detergent.