Voice enhancer makes my voice sound shaky or trembling every time....

The podcast voice enhancer is good, but not great. I've tried to use it as I experiment with its potential, but no matter how clean of a recording I give it, the result is always something that sounds like him shaking, trembling, or have bubbles in the back of my throat intermittantly... but enough to not want to use it in lieu of the original audio. I can't seem to get around it either no matter what I do.