Which is more important for curing after the initial solvent flash off for varnish--low humidity or lots of fresh air and air movement? Things are dry to the touch but can be dented with a finger nail. I can have low humidity with a dehumidifier (dropped the RH from 75% to 45-50%) or lots of fresh air with a box fan in the windows--but not both because it continues to be humid where I am located. (And the AC didn't get the humidity down in any appreciable way.)