Patio cleaning help
I am having a major problem with my patio, it's been neglected for a year as I was too busy focusing on the inside of the house to clean it or do anything with it.
It used to be a lovely yellow colour but has now turned black, I have tried most of the patio cleaning products on the market but I still have lots of black splodges all over it - looks like it might be a fungus/mould from looking at google images.
I've tried bleach aswell and nothing seems to be working. Any suggestions as to what else I could try please??