I tend to have pretty good success playing the hybrid about where you would play the corresponding iron.
I only have 3 and 4 hybrids, and I play them a little farther forward than I would say a 5 iron. And to second what someone else said, you may be overswinging a bit. I can smack those hybrids sometimes but if I get carried away, I have experienced the topped shot.
Also back to basics, a topped shot is often caused by a moving or bobbing head--which can also result from overswinging.