The easiest solution is to get the stronger latch. For the drawers that do not close all of the way, the latch picture on the left is the "pull" in portion of the mechanism. Check to be sure it is sticking out like in the picture when the drawer is open. Sometimes it is in the pull in position without the catch which you just have to pull it back out for the drawer to close fully. You have to use a small flat head screw driver or similar tool to get inside and pull it back out in the "open" position.