I can't get anywhere near mine with a hose , so :
Bucket of HOT water with Turtle wax shampoo ,
Sponge roof with suds , front&rear screens , bonnet & boot.
Squeegee suds off.
Chammy dry.
then :
Same again on O/S.
Same N/S.
Same on front.
Then rear.
Lastly wheels , by which time water is SHOT!!
45mins start to finish , seems to do a pretty good job.
I'm tempted to just take a rag & a can of Pledge out there now , mind !