Hi back to help you again!
Alright first off I'm very sorry you have to go through another bad incident with one of your suggies but lets begin.
Personally from everything I have read you should get a needless syringe first. If you don't have one on hand go to a store and buy one if possible.
Next mix a little bit of Pedialyte with water. More water than Pedialyte in it. (Or if you want use apple juice instead of Pedialyte.) Put this mixture into the syringe.
After that gently slide the tube of the syringe into the sugar gliders mouth and VERY slowly push the water out. Take time in between to let them lick it and swallow. If you aren't careful and let them swallow after a little bit of the mixture they could choke/cough.
I hope this helps and I hope your baby keeps fighting and stays okay.