Plant friendly path cleaner

Hi all,
Just looking for suggestions of a plant friendly path cleaner. I have a concrete path at front of my house loading up to front door but have a low hedge on one side and some border plants to other side and don't want to use anything that would effect these with any runoff.
Is there anything i could use here to clean up the concrete path. Perhaps a homemade suggestion as i cannot find anything commerically
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Hot soapy water and scrubbing brush. And some elbow grease!
Thanks hogweed. i'll give it a go at least. I guess i was looking for the easy option
Every couple of years I use a bucket of cold water with a glug of bleach and a yard broom on my patio.
It doesn't come up like new, but it does make a big difference
Wisdom is not putting it in a fruit salad.
I thought about bleach but i'm not sure around plants...
Oh - maybe not then.
My patio doesn't have any plants around it.
Sorry - back to the elbow grease! - Unless you can borrow a pressure cleaner
Wisdom is not putting it in a fruit salad.