Hello. Wow, no answers in 2 days. This place is weird. Some easy questions there is like 8 answers and then they can't answer the tough ones.
You are in flower, so you only have a couple of options and throwing out the plant is one of them.
You can buy some predatory mites from amazon and release them around the plant. Lady bugs would work too.
Anything you spray on the leaves and buds like oil or soap you will be smoking when it dries.
You can try Hydrogen Peroxide, mixed to about 1% would work.
You can try Isopropanol Alcohol in water, that will dry them out when they get it on them. Try... 3/4 water and 1/4 alcohol.
You can always add some cayenne pepper to the water for some extra oomph.
Always test it on some lower leaves first. If no reaction in a couple of hours your good to go.
Hope that helps.
Chuck.