I washed and blow-dried my hair Saturday afternoon since I had a friend's birthday dinner that night. After waking up with a slight hangover on Sunday (damn you, red wine), I sprayed this drugstore dry shampoo onto my roots and used my hands to work it into my hair. This dry shampoo is formulated with tapioca, which absorbs oils for a refreshed look. My hair definitely felt clean and free of grease after spraying this on and there was no white residue, which is often a dry shampoo concern for me because I have such dark hair.

This has been my holy grail dry shampoo for the last year and a half so, naturally, I had to include it in the mix. After leaving the office on Monday, I threw my hair into a messy bun and headed to a power yoga class. The class made me sweat but I wasn't drenched. Still, my hair was slightly curlier when I took it down once I got home. I immediately spritzed this dry shampoo, which sops up oil, sweat and odor, onto my roots after taking my hair out of its bun. It effectively got rid of the post-yoga sweat at my roots and made my hair smell like it was just washed.

I usually reach for dry shampoo sprays but I figured I might as well give a different type of formula a try — in the name of journalism, of course. The reason why I've stayed away from powders in the past is because I've been nervous that they'll be messy and leave me with noticeable white streaks in my dark brown hair. Luckily, I didn't experience that when using this dry shampoo, which features diatomaceous earth (a mineral compound that absorbs oil and adds texture), jojoba seed oil (which conditions and pumps up shine) and burdock root extract (which helps remove flakes). I sprayed the powder right onto my roots after a fun Restaurant Week dinner with friends and massaged it in until I couldn't see it anymore. The ends of my hair started to get even curlier on Tuesday and this dry shampoo helped enhance my hair's texture. It was a little bit messy, but I mostly chalk that up to my inexperience using powder dry shampoo.

Midway through my dry shampoo challenge, I have to admit that I was feeling ready to wash my hair. During the winter especially, my scalp gets itchy and flaky and I couldn't help but pick at the buildup that had accumulated over the last few days. I still had four more days of using dry shampoo to go, though, so I reached for this one, which eliminates oil at the roots. I love that it didn't leave any white residue in my hair and the smell wasn't overpowering. My hair felt light and bouncy, and I couldn't believe that I hadn't washed my hair since Saturday!

Only three more days to go now! On Wednesday night, I attended a press preview for Marc Anthony, where I learned about the brand's foam dry shampoo. Foam? Sign me up! I had never used this kind of dry shampoo before but the timing was perfect since I was nearing the end of my seven-day experiment. I brought a bottle home with me and got to work on Thursday's post-indoor-cycling-class hair. I was seriously sweaty and my hair was in need of a reboot. I dispensed an egg-sized blob of foam into my hands and worked it through my hair, focusing on my roots. The foam dried almost instantly and my hair looked and felt like I had just washed it, plus I noticed some extra volume, too.