I noted the tips about baby shampoo with interest. I've often wondered if food grade mineral oil, olive oil or some similar product might produce quicker dilution and flushing of oily pepper spray products than does water. Not being a father, baby shampoo hadn't occurred to me--it seems a more practical solution.
I worked in Glacier National Park the summer of 1999 as a member of the historical preservation crew. Mostly, I worked on back-country structures such as Sperry Chalet and several fire lookouts. Late in the season, while a coworker and I were near finishing some of the season's tasks at Swiftcurrent Peak, a visitor to the lookout accidentally discharged bear spray directly into his own face while preparing his backpack for the return trip to the trailhead at Many Glacier (he had the spray canister in one of those mesh-type side pouches).
My coworker and I eased the blinded hiker to the floor of the lookout's stoop and began flushing his eyes with water from the hiker's own bottle. While advising him to keep his eyes open as much as possible, we also tried to reassure the poor guy that the pain would eventually abate. By the time that his pain was easing, we had also contributed the full five gallon contents of one of our jugs of potable water to the process. It seems, in my memory of an event 21 years ago, that the visitor hung around another hour or a bit more before he hit the trail again, his eyes still tearing significantly.
I was concerned for the man's safety hiking that trail alone in such a compromised condition. As soon as the end of my shift had neared enough that I suffered no pangs of guilt, I shouldered my own pack and took off in pursuit. I overtook the puffy-eyed and runny-nosed hiker descending the switchbacks ESE of Bullhead Lake and accompanied him the balance of the hike down to Many Galcier and the same parking lot where I had left my own vehicle eight days before.
As it turns out, the guy was a research physicist. We engaged in a very interesting conversation about particle beam weapons and antimatter, interspersed with hunt talk, through the rest of the route. One of the more memorable incidents of a very entertaining summer, for which I also received pay!