Here's a tutorial that you might find helpful.
HI Becky, here's a video tutorial: https://www.youtube.com/watch?v=d-VEHcV7URA
It's basically watered down white glue.
Make sure you use Elmers glue. It dries clear.
This is the recipe i use all the time https://www.pinterest.com/pin/182536591132483428/
Tacky/Elmers glue + water. I like to shake it up in a jar.