After preparing the wood epoxy and filling it into the screw holes, you have to work fast enough to ensure that the screws are in place BEFORE the epoxy completely hardens. Otherwise, the epoxy becomes hard and doesn't bond the screw with the wood. Read the curing times of the epoxy and be aware of them as you work.
- Prepare the new set of screws. The new screws should be a bit longer than the old ones. The new screws are 3/4" long (shown below, left) while the old screws are 1/2" long (shown below, right). The new screw length is about right because the kitchen cabinet wall is 3/4" plywood. Any screw that is longer may protrude to the other side.