I am not understanding the comments about spider mights when watering your plants. Misting your plants at the wrong time of day leads to fungus on the orchid but never draws bugs. The exception to this is if it's really really dry then they're looking for water source.
I would recommend you use NEEM Oil which is natural treatment for insects. Do a search on this forum and there are several threads on using this to treat bug infestations. The good thing about NEEM Oil is it will also drive away bugs since there's something in there they just don't like.
Here's a link to the thread ..
NEEM Oil