How do you clean your roof?

Send some Victorian kids up from the local workhouse.

Car wash drive in park up and relax

the local kebab shop turks wash mine when they ain`t kebabbin on the night.

To clean the roof I use a long handled soft brush I bought for cleaning the caravan. Do as far as I can from the back then stand on the side steps and hold on with one hand to the roof bars for the rest. Easy from both sides,
Use stepladders to polish roof. Only about twice a year. Polish rest of car on a monthly basis.

i don't I've got a Roof rack fitted

Albanians see to mine lol