cleaning paving slabs

[Jayney]

What do you guys use to clean concrete paving slabs. i dont want to use anything harsh as the run is situated on the them.trouble is some or them are starting to look a bit greeny coloured and i want to clean them

[Tamsin]

Pressure washer?

[mrs munkee]

that's what we use and it works a treat - never knew we had coloured paving slabs- thought they were just dirty grey :D:lol:

[kathryn773]

boiling water, scrubbing brush, non bio wash powder, elbow grease.

[holidayhutch]

Pressure washer here too:D

[Jayney]

duh never thought of a pressure washer