The phrase "glue spots" refers to little areas where glue has been applied or spilled unintentionally and has dried up, leaving marks or spots. Full definition
Staff was unprofessional, there was damage to my car that they refused to fix, there were scratches and glue spots near the spoiler they installed. (autolist.com)
There are glue spots on the inside and I was wondering how to get rid of those and how you sanded yours. (repurposingjunkie.com)
Add another layer of tissue paper, this time adding a dot of glue on the bottom edge of the of the roll, about a half an inch from the seam of the first layer, but this time, place your thumb under the tissue between glue spots, to adhere the paper loosely. (knockitoffkim.com)