Well then your very lucky. It’s a guaranteed down here. You must be living in a low humidity area or you’ve found a way for preventive treatment. I’ve moved Bubba into a homemade box in a spare room to see if I can evade it on this plant. Here’s A link to the box. Homemade Grow Box--1st time trying indoors
It’s been in there for 10 days now.
Best of luck with your grows. 