Some very cautious people buy Pell Shower heads. Pricey and they need to replaced often but apparently quite effective. I will see if I can dig up some information or maybe someone else will post about it. There are other shower heads that claim to reduce NTM but I don't remember the names.

For me, I run the ceiling heater fan and keep the shower door slightly ajar, and sometimes opening the window. The ceiling heater fan works great as it brings additional air into the bathroom. I find the ceiling exhaust fans, which takes air out, can't keep up with the steamy air unless you have a really good one.