Other issues to watch out for when food, wax, etc. is attached to the part where there is no letters, numbers, etc.
Stuffing Up the Sink to Soak the Dishes. Wearing Rubber or Plastic Gloves. Pouring Hot Water onto Fats;
Part #1. Pulling off a hanging thread from a jacket, socks, etc., and removing a loose button;
A part of the wall that is made to remove (e.g., a Pesach kitchen).