Here's the final scoop...
I tried compressed air, but it doesn't work very well on grip puppies because they are so porous.
Soapy water is a must, but not the cure-all.
Smooth, round object like a screwdriver shank or small wooden dowel works great to help walk it on, but becomes pretty useless at about the 2/3 on mark.
Rolled up like a safe-sex toy makes the unit too tight to fit over the grip.
Best method...
Hose it down with lots of soapy water. Walk it on by hand as far as possible. Then use a cap snaffler (you know, one of those rubber things that helps you open jar lids etc.) to grab hold of the grip puppy. Choke that chicken that you haven't had any in weeks (which in my case is unfortunately true!). Cap snaffler gives you the grip you need to finish working that puppy in place.