We all spend ages cleaning our pride and joy so it looks great when we go for a raz on the twisties . Only trouble is that when we get back it's covered in dust, dead flies, mud and all sorts of crap!
When all the hard work is done, and she's gleaming like a good un, spray WD40 on almost everything, then polish it up with an old cloth!!
Might sound backward but it acheives several things;
1 - you'll be surprised just how much more crap comes off!
2 - it lubricates all those bits you couldn't reach or forgot!
3 - it repels water so keeps the electics happy and rust at bay.
4 - it leaves a thin protective film, so when you get back and have to clean your bike again, all you need is hot soapy water and the crap just washes away. Brilliant whether on a dusty summer day or the salted roads of winter!!!!
Of course we need to take care not to get it anywhere near the brakes, but if it does then ride with em on and it'll burn off in no time!
WD is the best i've found, but gunk is cheaper and nearly as good!