Moin together, I’m thinking about what would happen if you haven’t been washing since the car (for cost reasons and laziness). The only thing I would do would be to clean the windows regularly at the gas station and keep the plates readable with the sponge. Sometimes I would also suck out the interior for free. Doesn’t the dirt look like a “protective layer” for the paint after a certain time? My car doesn’t matter what it looks like from the outside, does it? There should be no complications. After all, trucks are always very dirty driving but reliable their kilometers off. Has anyone dared the experiment and not washed his car over a long period of time?