Those long strings that adhere to your hands when you open a banana are the makings of banana glue. Banana glue is almost always found on a table top or counter after breakfast. Once these long strings have dried all day or over night it is impossible to remove them and they will be a permanent part of the table top. No amount of scrubbing will remove them. You will learn to to use it in many ways once you have mastered the art of removing it.
Sue: What is this this brown strip on our counter?
Bill: That is the banana glue that I am making to use when I hang the poster in the den. I will either use it when I have enough for that or to patch the car seats where the cat ripped them on the last trip to the Vet.