If you have sticker residue after removing a price tag, try Wild Orange or Lemon Essential to remove it. This book was really old and had remnants from an old sticker. It wasn't gooey, it was hard and really stuck on. I was damaging the book trying to remove it with my fingernails. I tried Wild Orange oil, and voila! In less than a minute I had removed all the residue with just a paper towel.
The continued many uses...
Let me know your ideas. The uses of Essential Oils are endless.