How to remove excess glue from around the edges of paper?
cotton tissue: I find this to be the most messy option, since it's difficult to regulate where the glue ends up, which means you might get glue on places where you do not want it

a toothpick: The sharp point might damage your paper if you press too hard

craft knife: might make your knife dull!

I mostly use thick scrap paper (or craft sticks) to scrape the glue off and haven't had any problems with that.