Those who charge more for 1st cleans, how much more do you charge and do you find customers dont like/moan about this?
I don't have a fixed amount or percentage.
If the windows are in a reasonable state and it feels like they will be a genuine regular, I will probably just charge my normal price.
If the windows are a bit of a mess and/or I sense that the customer might not be around too long, it's anything from adding between a third and two thirds.
If I get a bad feeling about someone wanting a cheap one off, it's double.
Any of the above may be varied depending on my work situation at the time.
I've n ever had a customer moan about this yet. Mind you, a couple of them bumped me for the money down the years.
Using my intuition does cause some variation, but my initial feeling about a customer is usually about right.