when I had an old car I used to wash it maybe once a year, guy next door to me used to spend 3 hours every Sunday washing his, sad reality is his car was only one wash cleaner than mine regardless of all the hours he wasted.
Well 3hrs is a tad overkill lol. It takes maybe 10mins for each car and they are clean.
Its a positive way to start the day walking to a clean car. its positive to sit inside a car that is clean. Others notice your clean car and it positively influences their opinion of you.
Of course weather determines a lot and then maybe you simply dont care as a car is akin to a metal box that gets you from A to B.
I dont drive a mundane car so it's more than a metal box to me. It draws a lot of attention so i need it to be clean to have a good positive impact.