pee rags....good or bad?

I like to hike, A LOT.  I also try and do a few backpacking trips each year because it involves my favorite activity (you guessed it, hiking!)

I know a lot of women who backpack a lot use pee rags instead of toilet paper.  I think it's a little bit gross but I do see the benefit of not having to pack out the paper so I'm considering giving it a try.  I've heard the sun will somehow remove the bacteria/germs but I don't know if that's a fact.

I'd love to hear others thoughts on this topic.  Do you use a pee rag, do you like your pee rag, do you have to wash it off or do you just let it dry?  What's the best pee rag material? 

To pee rag or not to pee rag, that's the question!