Relative Humidity While Hanging Trimmed Plants to Dry?

After you are done trimming, and have hung your buds up to dry, what is the best humidity level to dry them at? What is the perfect level of humidity to set so thata sealed room with a fan on can dry the buds enough to jar in two or three days?

The reason I ask is because I have a very, very low humidity where I live and it's hard for me to keep checking in on them every 4 hours... And I've messed up 3 times now on this part of the process... I mean nothing against really dry pot, except the fact that it smokes like a bitch!

Any tips?

I guess I'll experiment with 20% RH after I trim my plants. let them dry for 2 days at that and see if the stems snap...