Clean the window frame with a soft cloth or sponge and a pail of warm, soapy water. Do not use scouring pads since they risk damaging the uPVC’s shiny sheen and causing scratches.
Make sure to wash down the uPVC with warm, soapy water at least twice a year, then dry it off. Use a clear liquid spray glass cleaner to clean the glass regularly. Never paint uPVC window frames or use mildly abrasive paste or cream cleaners.