What's up all!? I live in a dry climate. RH is 15% right now outside.

I have my intake and exhaust fans going all the time to have nice constant airflow in my 2300 cubic feet grow room. (like 300 Sq feet 9 foot ceilings) . Problem is the intake fan is blowing that dry air into the room and the exhaust is maybe blowing the humid air out. Also, I could just be an idiot and none of that is true. :-)

Anyway, even with two small humidifiers in the room and all fans going I can only seem to get the RH to about 40%. Not horrible but I'd like to get it to 50-55% for Veg cycle. When the humidity goes up outside to 35%+ the humidifiers get me to 50% but that doesn't happen often enough.

So when it's dry like this should I turn off intake and exhaust fans for several hours at a time and see if that helps the humidity rise? (I'm assuming blowing dry air in AND sucking humidity out of the room is what's keeping me from getting to 50%) Then turn on all fans for an hour or two for fresh airflow? Or is there another way to get my RH to 50% in this dry climate I'm not thinking of? My grow room is Thanks!