J.T.
Have you tried letting her do it with the squirter by herself? I do this with my son, but I can't remember at what age we started this. He loves it. After the medicine, I fill the squirter up with water a few times to wash the medicine down--he wants to keep doing it over and over! Ha! A few times early on, after explaining why it was important that he take the medicine, if he still refused, I had to hold something hostage like a favorite toy or show. A long standoff would ensue, but I don't think I ever "lost". Sounds terrible, but his staying sick was more terrible.
Good luck!!