Boofing..more or less water?

I'm sticking to doing boofing and monkey water. I know how to do it and all that, but does anyone have insight on if it's better to use more or less water? Not like a HUGE difference but I usually use one of those blue bulb squeezy things with about 2.5-3ml of water, OR I use a 1ml needle-less syringe (full of water, or close to full) but they both seem to do pretty well..anyone know if the one with slightly more water is more effective, or the one with less? Unless it's such a small difference that doesn't even matter.