Use proper microphone technique and invest in good mic with pop filter.
If you dont have pop filter try crosstalk, dont talk directly and too close to the mic but on off angle.
Speak loudly then usual. Dont increase sensitivity to max just to compensate the low volume of your voice just speak louder.
In good situation the mic should not pick the room noise floor but only your voice.
PS. I accidently deleted my last post so I am posting it again.