Adding fuel to the "It's not what you know, but who" fire, I can (as well) indeed confirm that "Dawn" was used to clean oil from animals affected by the BP Gulf of Mexico oil disaster. The retraction you might have picked up on considering the subject of saving wildlife in the Gulf with Dawn, Blue moon, and any potential manipulation of it's perception, could be related to the epic subject of BP's liabilities surrounding the disaster. Apparently there was quite an effort put toward guarding some of it's more gruesome realities. Dawn did in fact play an effective role in saving the animals, that were saved. The problem was the related question, exactly how many animals did die? In fact, quite unfortunately, more died than were saved - but not necessarily due to the animals succumbing to the volatility (vaporization) of the cleaning agents reacting with the oil on the animals, but instead from the many hours of exposure the animals experienced pre-rescue. And then there was the stress, coupled with the fact that some animals just got trapped again. The horror..
This off-the-subject tangent of bird feathers did prompt me to make a few calls this morning. Quite ironically these conversations about wildlife morphed us straight back onto the original subject of fluids to be used on our printhead cleaning quest. Dawn's use with the oil soaked birds was more to help rinse the oil away than it was to break it down. To "Un-stick" it. In theory then, soaking our printheads in a pure solution of Dawn might do nothing at all for our cause. We need something to break the dried ink down, first, which I assume is where the isopropyl alcohol comes in. The most fascinating element to come from the Gulf of Mexico conversations, relating to our printhead disasters, is the introduction to some new (for me) knowledge about oil degredation. If Dawn falls under the "un-sticking and carrying" category of cleaners, then we need to explore the "Degredation" category of cleaners, which we are.
Apparently there do exist today "environmentally safe" cleaners which degrade oil all the way down to an atomic level. These cleaners are biodegradable. Here is a quote from one product called "Kill the Spill
The safety aspects of the product is its non-petroleum, non-corrosive, non-toxic, non-flammable, and contains no VOCs. Environmentally its attributes are in it being water based, leaves no residue, contains no chlorinated solvents or phosphates.
This tiny biscuit of information was offered to me more as a carrot than as an answer. Some teach more by aiming I guess. But I am not a chemist, by the time I decipher this riddle we'll all be in retirement homes. Any help understanding if any of this can apply to our printhead cleaning quest, from our resident chemist, would be duly appreciated