What is your plant potted in? Have you checked the roots? I have found that plants I have purchased locally (also in Chico) are often tightly potted with a moss mixture in the middle and the roots are rotting. You might have to loosen things up.
My oncidiums (2) don't get any special treatment.
They are at room temp in a large southfacing window. Sometimes the ceiling fan is on, sometimes not.
They are in a loose potting medium that drains well and I water before they dry out completely. I water by soaking the pot for 10-15 mins.
Maureen
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