Short Answer 
To secure your door with a rubber band, gather a strong, durable rubber band and wrap it around the doorknob, stretching it across the lock button. Test the setup to ensure it creates enough tension to prevent unauthorized entry while still being functional.
Step 1: Gather Your Materials
To effectively secure your door with a rubber band, first, you need to gather the necessary materials. All you need is a strong, durable rubber band. Make sure the rubber band is large enough to stretch comfortably around both the doorknob and the lock button without snapping. This provides the necessary tension for the technique to work effectively.
Step 2: Apply the Rubber Band
Next, take the rubber band and wrap it securely around the doorknob. Once it’s in place, stretch it across the lock button on the door. This will prevent the lock from being engaged easily, acting as a barrier against unauthorized entry. The key is to ensure it is snug enough to resist pressure but not so tight that it risks breaking.
Step 3: Test the Setup
After applying the rubber band, test the setup to ensure it’s functioning as intended. Gently try to turn the doorknob from the outside while applying slight pressure to the lock button. The rubber band should create enough tension to make it difficult for the lock button to be pressed down. If successful, you’ve added an extra layer of security while you’re alone.