It is unusual for me to see spider mites so early in the year.
Baking soda spray usually works with spider mites.
At this time of the year you can add neem or horticultural oil instead of soap. Oil cannot be used if day temps exceed 80 degrees ( That's almost everyday here).
1/4 cup baking soda
1 tbs horticultural oil
1 gallon of water
1/2 cup of isopropyl alcohol
Spray undersides of leaves as well as tops. If the plant is in a pot. Cover the soil media with a bag. Invert the plant into a bucket with the solution and dunk to cover all the leaves. It is best to do this early in the morning while the weather is still cool.
In summer, I replace the oil with insecticidal soap. Oil will burn the plant in the heat.
Other recipes add vinegar and lemon juice, but it has to be hosed off the plant soon after or it can burn.
Bt should work on the caterpillar. Don't get the mosaquito preventer, that is formulated specifically for mosquitoes and does not work on caterpillars. I miss dipel dust. Anybody know where I can get some?
Happy gardening in Hawaii. Gardens are where people grow.