Spartan, lol. But, we all are getting spittle to some degree in our bowls. That is just the way of things.
But, I think the reason spit is preferred is the acidity that turns the ash to a binder. Water might work initially, but would it be as strong?
I have been using a drop of honey, to spoon-full of ash, and spit to consistency for a while now. I'm not sure where I got this recipe, but I has worked for me, and I have one pipe that will have held up with it for over a year.