Detergent to clean sandstone?

[Mike13]

Any recommendation for a decent detergent to clean off muddy footprints on grey sandstone paving? I want to get the brown patches clean before winter.

 

[JohnD]

If it's mud, just water and a broom.

Has it been laid with a fall so that rain runs off?

 

[Mike13]

I have cleaned and hosed it several times over the summer, still traces of the footprints, I want to try something a bit stronger, it seems to have been rubbed in. It's the riven sandstone with a bumpier surface. It has a slight fall, when the caravan dwellers first laid it it went up and down a bit with an average of zero fall, but it has a bit now.

 

[lostinthelight]

Pressure washer?

 

[Old Salt]

I tried this on oil stains on my drive. Took a couple of applications and a pressure washer but brought all the stains out.

No Nonsense Heavy Duty Degreaser 5Ltr

Order online at Screwfix.com. Ideal for the workshop, garage, factory and warehouse. Effective on a wide range of stains and on a variety of surfaces including metal, glass, plastic, painted or sealed wood. Suitable for use with pressure washers. FREE next day delivery available, free collection...

www.screwfix.com

 

[mylesw]

Avoid anything acidic.
This is a good alkaline cleaner for my limestone. Lasts for ages.

Revolutionize Cleaning with HR Future Clean

Discover HR Future Clean: The ultimate deep cleaner for professionals and DIYers. Fast-acting, amazing, versatile, and powerful.

hardfloorrestoration.co.uk

 

[Mike13]

Well the patio is sandstone, not limestone. I had to use HCl with a cup and old toothbrush where I had spilt some cement in some places and the stone did not fizz.
I will try that Alkaline cleaner first.