Not sure if its the right thread, but I have an old Ibanez RG 170 R, and I want to lower its action. To lower the action, I need to turn the two bridge screws. One of them seems rusted, and I have applied a lot of force to try to lower it, but no success (the contact point of screw and bridge seems to be rusty). While the other screw can turn freely. What can I do?