Emma Morris uses water with a little detergent and also a dry microfibre cloth. "Go over the window with the soft side of the squeegee, squeegee it off with the rubber side, and the microfibre cloth ...

Don’t be fooled by products that say you can squirt them on your glass and magic happens. Mechanical agitation is part of cleaning anything. Your body is cleaned in the shower by rubbing your skin.

This guide covers everything you need to know, from the DIY approach to hiring experts, how often to clean your windows, and best practices to keep them looking spotless.