I use a microfibre from Home and Bargain, they come in a little net with fitness written on it, they cost 99p, they are made as towles for the gym but they are amazing for window cleaning, I wet it at the start of the day and then it just soaks up excess water, removes grime and it doesn't drag dirt around, it just sticks to the cloth. I'm not joking go out and get one, they are different to anything else I have ver used. My dad is hooked on them now