UPVC windows and doors are a low maintenance alternative to timber-framed windows. A warm, mildly soapy solution will clear any dirt from the frames, and you could even hoover any leaf or debris from inside of the frames themselves. The windowpanes themselves will benefit from being hosed down and cleaned with a soft cloth and a soapy solution, before being hosed again and squeegeed to prevent any streaks from appearing. It’s important that you don’t use a scouring pad or wire brush, as these can scratch and damage your windows.