I believe Diane (or maybe Linda) recommended the Green Tea and Mint shampoo from PetEdge. I tried it and really liked it. The scent is clean but not flowery (some may not like the scent, so you'd probably want to buy a small bottle first) and you can buy in gallons! It sounds expensive, but when you compare that to the pet store types, its a great deal too...they also have many varieties of shampoos and conditioners to choose from.
www.petedge.com
www.petedge.com