Ether. Mites usually make webbs..Instead of using all those chemicals, take citrus to sink or outside hose and spray away..do this 3 times per wk.
Place a white sheet of paper under leaves and tap..then check the paper and see if they look like tiny mites. This is one way to tell.
I'd mist citrus daily..also add 2-4 drops of dish soap, finey chopeed garlic and citrus rind..mix. spray on plants 3 times a wk. Water does the trick w/mites..
Scale are a different problem..they're a lot harder to rid than mites. But both can damage a plant.
After a mite attack, leaves will be a mottled yellow. Toni

hunnybunny (forgive me, couldn't resist),

make sure you rinse off whatever you apply 24-48 hours after applying your remedy.

I found a couple of sprays with water diluted with dish detergent and a couple of showers in the showers ultimately rid myself of red spider mites. Big lesson learned was to wash off the soap from the fruit (if any has set) or it will destroy them.

I may have also used a q-tip with alcohol to rub over any visible red specks on leaves on stems, but was able to rid them all within 2 weeks time. I ignored the tree with them on for about a month and that was silly, but the tree is still strong. In fact, it still holds on to one leaf that was clearly affected by the mites as I can see yellow spotting on the leaf where they were mining for leaf juices. This tree is bearing one lemon at about 1.25" long, another at about .5" long, and a new one at about .25". The tree itself does not exceed 20" in height! It never ceases to amaze...