Other issues to watch out for when food, wax, etc. is attached to the part where there is no letters, numbers, etc.
Is One Allowed to Use Sticky Pointers on Shabbos?;
(Temporary Ohel) What is the halacha when some SCHACH fell down from the roof of the Sukkah;
How Do We Understand the Concept of Combing or Brushing One's Hair?;