Recommend Muck Off. You can get it from Halfords.
Spray on and leave for say 5/10 mins.
Use a stiff brush to loosen the debris.
Then wash off - you can use a low pressure spray.
Dry off or allow to dry then spray on a " finish" coat of say Bike Spray ( also a Muck Off product).
This will leave a factory fresh finish on all parts and help to protect against rust!
You could also use WD40 or ACF50 in the winter.
Hope this helps :))
