Despite the name, It's not just you, most people don't find Youth Dew fresh and dewy, but rather a heavy spicy oriental.
There are many types of perfume that come off as clean and fresh. They usually have a touch of flowers, but many aren't particularly floral. For instance, you could look into "green" perfumes, ie those based on fresh grassy, vegetal notes. Examples include Chanel Cristalle (and its lighter Cristalle eau verte) or Estee Lauder Private Collection. With a few more flowers, there are he so called aldehydics, like Chanel No 5 and its flankers. And then in the superclean category, there's Estee Lauder Pleasures, which I am not too fond of, but which was indeed created to give a day-long sense of just showered.
As you probably know, when testing fresh and light perfumes, be careful to wait for the drydown. Often, the top is fresh, but either the perfume disappears quickly, or moves into heavier and more chemical drydowns.