I too use Elmer's washable school glue, however, I also dilute it as well. When I first tried it I did so on scraps. For me I thought it stuck tooooo good. So I diluted it...not sure about the ratio but somwhere around equal parts. But I test out and add more of what I think it needs to make the consistency I like for it to adhere. What I like best is when I try to take the seam apart I don't have to use too much force...you know...so it doesn't stretch the material at the seam/