Use a screwdriver that fits, and replace the screw as soon as you get it out.
Go get one of these.

None are more hopelessly enslaved than those who falsely believe they are free.
use a pair of pliers. but be careful.
Ibanez RG321MH (Air Classic/Tone Zone)
Fernandes Telecaster (Twang King/stock bridge pickup)
Blackstar HT-20 (Scumback 55 speaker/ Tung Sol tubes)
TC Electronic Nova Repeater
Lava Cables Clear Connect, Soar and Mini ELC