I think he might have that thing that tries to predict what your going to say but gets it wrong half the time. It forces me to proofread everything & don't know how to get it off my ph! (Grrrrr!)
I use lemon joy (non-concentrate) in a spray bottle & wash them away every day till they don't come back, but since I do this often as a preventive, I've never had an actual infestation. Washing your plants is good prevention.~~~~~~~~~~PEACE!~~~~~~~~~~~~~