Finding red wax (or any colored wax) on or near your door lock can be unsettling—but before jumping to alarming conclusions, it’s important to consider both innocent explanations and potential warning signs.
Here’s a balanced, practical breakdown of what it might mean—and what to do next.

🔍 Common (Harmless) Explanations

1. Plumbing or HVAC Work

  • Technicians sometimes use colored wax pencils or crayons to mark pipes, valves, or fixtures during inspections.
  • If recent work was done near your exterior wall, wax may have accidentally transferred to the door or lock.

2. Utility Marking

  • While utilities typically use spray paint (not wax) to mark underground lines (red = electric), a worker might use a wax pencil for small notes.
  • Unlikely on a lock—but possible if marking a nearby meter or panel.

3. Kids or Pranks

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