
Depending on the breed, it could be just a breed thing. You havent mentioned the breed, but I know in my breed, the min pin, the black and tans have a horrid dander problem. More noticable after exercise and baths.
Something I use that seems to help, is a shampoo specifically made for Black and Tan dogs. It apparently is supposed to enhance the coat, which it does a bit, but it does more help with the dander. Also, regular brushings help as well. A lot of pin people, dont think they need to brush their dogs with the short coats, but it works real well at keeping dander down as well.
Again, I can only go with what works with the pins. So it may be completely different, if you have a wire coat dog, or a longer haired dog.