Same here, Jim. I would be such a happy camper without scale.
Everything looks good when I water, then I grab a plant and look at the side towards the glass!
I guess bugs like to stay comfy and a bit drier than that part of the plant which gets more flooded.
I think the key is staying on top of things, move things periodically and inspect and try to catch it before it gets out of control....hopefully.....remove that skin on those pbulbs if possible, all the way down to the rhizome, that's where scale loves to lurk.
I don't have too many Cymbidiums any longer, but years ago I used to soak them outside in the Summer a couple of times with Bayer's Rose and Flower Care, works very well as systemic. I still treat some of the Cattleyas in Summer with that stuff.
