Yes, I detangle on dry hair. When I wet my hair, it snaps back and shrinks up like nobodys business. I have nearly bsl hair, and my wet hair is twa length. In other words, my hair is not only more fragile when its wet (like everyone elses), its also alot more coiled and compact together-- i.e., tangled. So no matter what tool I use, I have to stretch a piece out w/my hands and create single strand knots and more tangles as Im combing trhough the wet hair. I have to rip through it to get the comb out and lose hair, stretch strands beyond belief (since wet hair is full of water and stretches to its brinking point), and lose more hair than I save.
Now that I use the tangle teezer, I feel weired calling it detangling since it just glides through my dry hair like butter. Its hard to explain, but I have a shine, sheeen and softness I never experienced w/any hair tool.