Other issues to watch out for when food, wax, etc. is attached to the part where there is no letters, numbers, etc.
Part #2. introduction to the Melacha;
Cutting and eating all other types of fruits (e.g. oranges, grapefruits, cherries) and what to do with the leftover juices.
could we say that "קיימא (permanence) applies to תופר in conjunction with gluing, taping, sticking, etc.