Other issues to watch out for when food, wax, etc. is attached to the part where there is no letters, numbers, etc.
Does It Make a Difference How One Removes Something Growing from the Body (e.g., Cutting vs. Biting Nails, Cutting vs. Plucking Hair)?;
Doing הכנה (Hachana) With the Yom Tov of סוכות (Sukkos);