My personal preference is to insert a parametric EQ of choice, increase the gain on a mid/hi band with a narrow Q, then sweep it back and forth in order to increase the fizz. Once you find the right frequency, then start lowering the gain below 0 until it starts to improve. Repeat that process one or more times to cover the range of the fizz since it often isn't a single frequency. It takes some time but it should help. And once you've done it a few times it will get easier to find the right balance between reducing the fizz without dulling the guitar.