How To Patch An Old Outlet Hole In Drywall . Whats up handy home owners? Unscrew the machine screws at the top and bottom of the outlet with a screwdriver. How Much Does Drywall Repair Cost for Small Holes? Angie's List from www.angieslist.com Unscrew the machine screws at the top and bottom of the outlet with a screwdriver. Having been a secretary for many years i used the white out method. Cut along your line with a utility knife, then peel away the paper.