How do you swap faces?

[Super]

Here is a suggestion that may work although I have not tried it. Make a visit to your local Pharmacy like CVS, Rite Aid etc. and pick up a Eyewear Repair Kit. They generally have a small screwdriver that may work for you. probably only around $2. Just cash in some soda cans and give it a try. The kit may have a slotted screwdriver but it probably small enough to fit the Philips head screw..