Some people say that windows should not be cleaned when it rains because the rain will just make them dirty again. Is this really true? The simple answer is 'no', windows need cleaning because they get dirty not because they get wet.
Three major causes of dirty windows are:
Dust, Pollen and Droppings.
If any of these are present on the windows when it rains, the residue in the rain attaches itself to them and can often make the windows look dirtier. When windows are clean the rain will simply run off and the glass remains clean!
For this reason I will still clean your windows in light to medium rain and offer you a rain guarantee. If you are not satisfied with the job I have done, I will come back free of charge and clean them again.
Check out the video below that explains it.