[david@zap-clean]

Couldn't get this one properly clean:

[robert meldrum]

Not surprised 

[dan paton]

if u need a new lawn that badly i got a bag of grass seed u can have

[Paul Moss]

Its a caravan ground sheet that has a rubberised finish. Too much water pressure from a jet just makes holes in it.
Best way to clean it is to soak it in a pit with a hot detergentbfor a few hours then scrub it lightly and rinse it with yer hose.