We like to joke about dirty, sweaty ranger Aragorn, but you know what I thought of? Out of everyone in the Fellowship, Aragorn probably is most familiar with how to bathe in the he wild. He's had the most experience with knowing how to take advantage of spots where there are clean water, etc. He probably knows some kind of magical plant that, Idk, helps keep your hair clean or something.
While other Fellowship members like Boromir, Legolas, etc. also have experience as warriors, they don't literally live in the wild like all the time. Aragorn does. Plus, he was raised by Elves. The sons of Elrond hung around with the Dunedain a lot. So if you subscribe to the idea that Elves are more particular about keeping clean, you can reasonably assume Aragorn might've had some influence to bathe every now and then, even as a ranger.
And that's not to mention how the mental image of Elrond's Disapproving Eyebrow Face or the sound of his mother's shriek the first time Aragorn came back to Rivendell from the wild looking all filthy dirty, are probably seared into his mind for eternity. It's a mental reminder to at least wash up every now and then, like the respectable Man his mother and Elrond raised him to be!
Of course, that's not to say Aragorn makes use of the knowledge he has. Or that even Elrond's Disapproving Eyebrows are enough motivation for Aragorn to regularly bathe in the wild (after all, what Elrond doesn't see, Elrond doesn't know...err, maybe 🤔)
Still, it could be that, in spite of it all, Aragorn really is the dirty ranger we all joke about. 😂
