Many crafters would agree... Bearly Art is the best glue! Why? It's acid free, archival quality, dries clear, adheres well, but the top-most reason is... The Precision Tip! You can use it on the smallest of areas.
In addition to being my favorite glue, I found a product on Etsy (Store name WhimsicalWishesUS) that keeps me from having to put a pin in it to keep it clear. I can store it upside down with no leaks so it is ready to use right away.
I am not affiliated with this Etsy shop. It's just a useful product that I really like.
What glue do you use?