Cleaning yellow sandstone patio

[PatioCleaning]

I have a yellow sandstone patio which needs cleaning. The pressure washer alone doesn't really get it clean. Should I use detergent or similar first? Any suggestions?
It's quite a large area, so don't want to scrub it with a broom.

Ha Ha. Good luck.

Jet wash first with a very high powered jet wash then use a proper cleaner like lithofin on stains and then use wet and forget on it.

I used this stuff, it's fantastic. Very strong you need a mask and wear old clothes.

www.amazon.co.uk/gp/product/B01BTVNDHK/ref=ppx_yo_dt_b_search_asin_title?psc=1&tag=mumsnetforu03-21&ie=UTF8

Thank you!
Forgot to mention, I'd prefer not to kill off the grass or the wildlife, if possible.

wet and forget will be your best ever investment. Its like magic

Try Rob Parker’s Best Patio Cleaner. Superb at killing black spot which is the blight of many UK sandstone patios. Read this blog

Https:www.stoneworld.co.uk/how-do-i-remove-black-spot-from-my-patio