Cleaning under solar panel

[Ray4*]

Cleaning my caravan for the new season and trying to clean in the gap between the underside of the solar panel and the roof.
Toilet brush, or somethimg like a baby bottle brush or similar?
Any suggestions welcome, as the rest of the van is gleaming.

 

[JTQ]

Radiator cleaning brushes, LINK for various examples.

Not that I see much to be gained by cleaning under them unless the dirt is prone to migrate.

 

[Ray4*]

It's a bit green under there.

 

[Mr Plodd]

It's a bit green under there.

And who exactly is ever going to see it? Other than you when up a set of step ladders of course.

 

[Ray4*]

Don't want green streaks down the side of the van when it's raining, or on my awning.

 

[toad a caravan]

If there is a gap from one side to the other a length of 20mm pipe lagging may help

 

[birdman101]

Done it for years pushing a wet sponge underneath and out the other side with a garden cane. Present caravan not a problem as flexible type bonded directly to the roof

 

[GUMPY]

If it's green, just spray some Patio Magic under there and the green will disappear after a few days. Same goes for any green on awnings etc.