The flashlight and camera on your phone can help you zoom in on it. If the idea of that is overwhelming and your luggage features a built-in TSA lock, you can try this:
Although, admittedly, this seems time-consuming, they assure it should take 30 minutes or less, especially if the first number is a 0, 1 or 2 (something to keep in mind when you’re coming up with a new combination).
Travel Sentry, whose red diamond logo certifies that a lock is TSA-approved, recommends trying every possible combination from 000-999, starting with 000, 001, 002 … and working your work to 999.
