My calamondin citrus always gets infested with scale insects. Today was the alcohol and Q-tip treatment. I try and check the underside of every leaf and stem along the veins for the little armoured creatures, then give them a dab of the alcohol and with the dry tip wipe them off the plant. I am just that crazy. The first sign of infestation is the clear, sticky honeydew they excrete which falls on the upper side of leaves below the creature. She’s worth it!