I wash all my baby quilts (family & clients) in Tide Free. Most parents only use Dreft for the first few months after their first baby. My sister researched it & found that Dreft is basically Tide Free with "new baby scent" added. If you don't want to buy a fragrance/dye free detergent, I'd just wash it with a regular detergent & let the mom know that you've already washed it in "regular detergent" and provide her with washing instructions. If fragrance is a concern to her, she'll know how to wash before giving it to baby. Some parents don't worry about special detergents, so it might not even be an issue.