Hissy voice

[David Sanders]

My recording technique and results are getting better, but my biggest problem at the moment is my S sounds are very hissy. That's even if I'm recording in my closet full of clothes, and I speaking past the mic, not right into it. Maybe that's just the way I talk, but what's the best way to reduce that? Equalizing is the best so far; any other options?

Mic: AT2020 USB