On Sun, 07 Aug 2016 16:14:47 +0100, wrote:

On Friday, August 5, 2016 at 5:18:12 PM UTC+1, Mr Pounder Esquire wrote:
My concrete flagged patio is looking a bit grotty even though it gets loads
of sunlight. I jet washed it using washing up liquid, but it is still not
brilliant.
I jet wash it every year.
It has been down for about 5 years and always looked fine up to now.
Does anybody know if patio cleaner really works?

You jet washed it with washing up liquid?????

FFS! Jet washers dilute detergents to about 3%

That won't have any effect whatsoever, other than creating a lot of bubbles! And if not rinsed off thoroughly it can leave a residue that attracts dirt.

General rule; Use washing up liquid for washing up, not patios.

A jetwash washes by brute force, no chemicals are necessary. It should take anything off a driveway all by itself.

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