Cleaning the pavement

My grandmother used to clean the pavement every week during summer.
Just a brush, or some water and soap and a brush.

But the first cleaning in spring was special.

She would take vinegar and some washing up liquid, shake it a few times and then sprayed it over the pavement before a dry night.
A few days later the green had become brown and we could brush it away without too much effort.

My mother wanted us to remove moss with a knife, but it always came back soon, unless she was away and I could use my grams solution.

I still use it, also on walls with algae.