Cleaning roof ?

[autoswan]

My mh has been standing outdoors over the winter and due it's annual bath
There are lots of small black spots all over the roof, some type of mould ?
They took a lot of elbow grease to remove last year. Apart from washing it more regularly have any of you come across this and found a cleaning agent that shifts them easily without harming the plastic covered roof ?
I've used a few usual cleaning things you add to the water but they still leave small black spots but only the roof is affected. Thanks.

 

[PP Bear]

I used these, they're excellent and kept the muck off the roof and the water and dirt just bead off and the shine lasts a year.

Just be careful after using the wax, as the roof can become really slippery.

 

[ianthebuilder]

A pressure washer gets rid!!

 

[RowleyBirkinQC]

A pressure washer gets rid!!

So does my Ginger Roof Monkey!

 

[autoswan]

Thanks
I Used autoglym and power washer but they still leave smaller black spots which take ages to rub away. I'm thinking some type of mould, vegetation type killer that will turn them to dust to wash away easily without harming the roof surface ?

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[ianthebuilder]

So does my Ginger Roof Monkey!

Can I borrow him?

 

[RowleyBirkinQC]

Can I borrow him?

I’ll ask her if there is something I should know and refer you to my earlier contracting out offer...

https://www.motorhomefun.co.uk/forum/threads/roof-cleaning.172477/#post-2776532

 

[River gypsys]

Mr muscle kitchen cleaner, spray on, leave for 2/3minutes wipe off

 

[rb62]

We're surrounded by people with log burners so get all sorts of s**t on the MH roof.Took ages to get off after the first winter we had the van but now it gets a good polish and wax twice a year and the s**t just hoses off