I have a suitcase that I have not used for years but I cant remember the numbers. Its open and I pushed a thingy on the back of the lock inside the suitcase and all the numbers went to zero, but I cant remember how to reset it with a new set of numbers?.
I was able to remove the lock because my case was open but in a locked position so after unscrewing the lock from the case I found three viewing holes at the back which when lined up correctly show the correct combination, probably won't work with every lock but worth a try