The prongs of turn locks can only be bend and straighten a few times, each time weaken the metal until the prongs break.
When I remove the turn locks, I always use a small needle nose pliers to straighten all the prongs. When put it back, I use the round side of a small stainless steel spoon (the ones you use for sugar), slowly push the prongs to bend from bottom (where it come out of leather), till flat, then flip the spoon use the edge to press the end of prongs down toward leather. Usually can put the turnlock back tight. The key is the prongs need to be straight, so when you bend them with spoon, it will start to bend from the very bottom.
View attachment 5044151
I may have misread the post but I think she meant the twisty part of the turn-lock becoming loose? I had that happen once & I couldn’t retighten the twisty mechanism