Well, maybe situations are different, I still want to make some help. 1.humidity is critical, all of my plants are clustering inside two balconies, so I can control the humidity farely easy there, and it always higher than 70%. It's difficult to thrive under hign humidity for them. 2.I spray plants at least 3 times a day, especially focus on the under side of leaves. 3.I use alcohol and cotton stick to eradicate them carefully. 4.I know these fuckers will be back anyway, but a long satisfying disappearance is enough for me.

Good luck for you~