get a spray bottle add a tiny drop of dish soap, preferably unscented original kind , a tiny drop of cooking oil, 1 table spoon of red pepper flakes, a pinch of garlic powder & a pinch of onion powder. spray the leafs on the top and bottom sides.
This should be for a spray bottle about the size of a quart
Test it on one leaf before you go balls out. wait a day if its fine then spray your plant with it.
garlic and onion are natural deterrents because of their odor. the pepper will burn new nymphs and the oil and dish soap will make it stick to your leafs