Cleaning your walls is seriously one of the most outdated tasks nowadays. People just shy away from this responsibility and cite many reasons for this. The arduous task of cleaning the walls is something that our generation cannot handle and we more often than not end up hiring external help for the process.
However, you can save the cost you spend on external help by arming yourself with the right tools and knowledge. Even if you don't have the right tools with you, you can become creative to select some tools out of the many you have. This can give you a lot of options to hover around. One option is to have a big pole like stick and attach a rag to it. This would give you the height and the strength you need for this job.