With the ambient temperature at 7c and set to drop over the next few days, it was today or not at all to give mine a quick wash. Anything below 7c and it stays grubby, but my route to work, albeit only two days per week, is rather agricultural as I refuse to use the M3 in the mornings, so the Golf takes on the appearance of a white car with a graduated matt brown finish, which becomes browner towards the sills.
It's a miserable job at this time of year, but I've got it down to an hour - rinse, wash with Gyeon Bathe +, rinse, dry, wheels, dry around door shuts, dry wheels and finally clean the windscreen, mirrors and rear window with Stoner's Invisible Glass.
And indoors for a cup of tea. I don't care what the weather does for the next few days.