I've tried about 25-30, and while no dry shampoo is absolutely perfect, some of them are really amazing! I've only shared the best of the best here. These are the ones that work great for me and I'm more than willing to pay money to use them again. All of these do the job. They suck up the oil, give me volume and don't leave a white cast to my hair. They all will last a good 12 hours as well!
Batiste Dry Shampoo: Look for this one at ULTA. It comes in 2 scents, I've only used the "Blush" which is a light floral scent. I smell it during application, nothing lingers.
Suave Professionals Dry Shampoo: This stuff works great but can be hard to track down. At least near me. It's constantly sold out! Maybe it's a sign?
TRESemmé Dry Shampoo: There are a lot of options for the TRESemmé dry shampoos. Volumizing or not? Foam or spray? It should be easy to find one that might provide a little side benefit for your hair. I'd stick with the spray unless you're curly, I found that the foam is easier to use than a spray on days I'm curly. Why? Because I need to use a natural bristle brush to get rid of all the white-ish cast left behind by a dry shampoo, which is a nightmare with curls. The foam doesn't need this step, though it usually isn't quite enough to sop up my oily hair on straight days.
Ojon Full Detox: This has a nice fresh scent and I thought it was one of the easiest to apply without a white cast to my hair.
Oliver Ifergan: Full confession.... this is the dry shampoo that lives on my bathroom counter and that I reach for about 95% of the time. I love this stuff. It sucks everything up, gives just enough (but not too much) volume and I barely even have to zjoos my fingers through my hair to remove the white. I'll be sad when I finish the can.
Finley Hair Powder: Finley comes in different colors, which is great for avoiding the white cast if you have darker hair. But use a very light touch! Too much and you can make your hair look like hair plugs. Really! (I did it.) A small sprinkle, zjoos and zjoos a bit more and you're done.
Keratin Complex: I can't actually find my Keratin Complex dry shampoo (I believe it is hiding out in my bathroom somewhere), so instead you get to look at my box with the refill. This is my favorite of the powder products. It is released through the brush! Just shake a little, and brush onto hair. It is so easy to get a well distributed application and no overdo it! Oh, and it comes with a free refill!
Oscar Blandi Dry Shampoo: This is a classic, mentioned on almost every dry shampoo best of list. It just works. I like that the application tip is little, I put it in my part and slightly squeeze the bottle. (I don't know if this is what you're meant to do, but it is how I use it.)
Some of these products I bought, some were sent to me.