I've heard to never mist, however last year I got a patio mist system that I set up for my vandas and used during summer and it seemed to work wonders, it would lower the temp a little and the vanda roots loved it, I saw an impressive difference in a few months, lots of new root growth and stonger roots. I grow outside 24/7. But to use a spray bottle forget it I would need a prosthetic finger by now.