This one really is easy. It must be because I do it myself! Mix up your very own glass or window cleaner in a jiffy.
Save one of those spray bottles then just pour in 1 jug of water and a quarter jug of vinegar. Hey presto your own cleaner.
I particularly like it for cleaning my glass hob and oven door, spray on, rub with scrunched up newspaper then buff with one of those e-cloths.
You will feel incredibly virtuous I guarantee it!