To Wash, or Not to Wash?

So I've been debating recently whether or not I should be shampooing my hair, with my cornrows between salon visits?

When I first started wearing cornrows, I went to the salon bi-weekly to get my hair shampooed, treated, and re-braided. I figured I could save a few dollars if I cut down my visits to every four weeks and just care for my hair myself in between. My stylist told me that it's not a good idea to shampoo my hair while in cornrows because this causes tangling. However, I decided I would shampoo my hair anyway because I thought she was wrong. In my mind, I don't understand the difference between wearing a sew-in weave and shampooing your hair with the sew-in, and wearing cornrows and shampooing your hair? When I asked her, she responded that the braids are smaller for the sew-in, so that helps reduce the tangling. I'm not sure that I completely buy that rational.

Long story short, I have been paying close attention to my hair when I remove my cornrows because if I'm going to torture myself go hard with protective styling, then I want to reap some rewards. I have noticed that my hair is a bit tangled when removing the braids, so perhaps there is some truth to what my stylist said. The dilemma then becomes, do I go back to my bi-weekly visits so that I can keep a clean scalp and my hair in decent shape? Or do I seek alternative options such as using a dry shampoo?

I was browsing through Sharday's blog, The Awkward Stage and reading about how she cared for her hair in 2010 when I believe she was wearing cornrows under a wig. I noticed that she used ORS Herbal Cleanse, which is a dry shampoo designed to clean the scalp and hair without water. I am considering using something like this because I know I must keep my scalp clean while wearing my braids, but it seems as though shampooing weekly isn't the best solution.

Have any of you ever used dry shampoo? If so, how did it work and what did you think? Should I try this? Decisions, decisions...