Composite decking cleaner

Morning all, does anybody have any recommendations for a composite decking cleaner that works great? I used a jet wash last year with washing up liquid but it took me hours and needed so much scrubbing too. Hoping to get something to spray on, leave and then it magically just washes all the grime clean with the jet wash… Moon on a stick type stuff. Fire away please.

I use Fenwicks Caravan Cleaner which works really well. Cheap too.

Were you using a a regular jet wash wand or a dedicated patio/decking attachment? I find the latter are way more more effective.

Cheers, I’ll order some of the caravan cleaner and see how I get on!