I don't want my kids to be "sticky"?

As a child, I was always clean. I hated being around all other little kids because there hands and faces were always covered in some form of sticky goop, they did gross things like eat dirt, and pick there nose, and always had there hair tangled and didn't like to brush their teeth. I always loved looking pretty, and I was always polite when eating, I didn't like "gross" things. My mom made sure my hair was always looking okay, and I had clean matching clothes, pretty much that I was sanitary as possible. In the long run, I do feel this helps me. I like being clean and orginized, and I also enjoy looking good, which I feel has helped me alot with my self confidence. Over all, it just helped me develop good habits. My little cousins are completely what I hated as a kid. They always don't have matching clothes on when they come over, they never where socks, or if they do they are filthy, their faces are always covered in sticky stuff, and they even leave sticky little hand prints alllll over my house, and their hair is all tangled and un-styled. I know alot of kids are like this. I don't want my kids to be like this though. Its not like I expect my kids to never be dirty, because I know this isn't possible. When I was little, I used to go hiking with my dad and I would sometimes fall and get dirt on my clothes, but I firmly belive that kids should just be dirt covered and disgusting all the time, because it really isn't healthy. How can I raise my baby to be clean, and understand how importent it is to be clean and have pride in yourself, just like my mother taught me?