I used to buy the arlenes glue, until I read on here about using Elmer's school glue. I now refill the arlenes bottles I saved with the Elmer's. Works perfectly. Hit it with an iron to set it, and your ready to sew. The fine tip that comes on the arlenes bottle is great for getting a thin line or a dot of glue in just the right spot.
Hot water and a straight pin keeps the long tip cleaned out and working perfectly for years.