I know humidity is a great attribute to growing orchids, but I might be wrong, feel free to correct me...but when growing indoors, without an orchidarium and it's kind my indoor humidity is not so high, and I have seen where my plants have "learned" to acclimate to the enviroment. Maybe some have had a slower than normal time getting to that point and showing disappointment by not blooming but one day they will love me for it

I fear mold/mildew and prefer to keep my humidity at about 55%.