Dude, Your Babies are sick... 98% chance that you have used chemical ferts that caused unnatural stess on the plants. We fuck up every time we try to improve Nature, as opossed to working with Her. Do you need to flush... Why give your Baby something that needs to be flushed away? A Toixc, then non-Toixc? Ask the Fert Marketing Experts what your Babiy needs. They will tell you what they have to sell. Then sell you some more chem shit to "solve" the problem, ditto. Dishwashing liquid coats everything to sufficate the plant cells & insects, causing death & more problems. Your plant can't absorb proper light with this chemical mask on her face, not to mention the chems absorbed. When She popped the seed, she had the ability to build up an Immunity System, which was deleted by Chem Nutes, now , we have problems. Spider Mites only attacks sick plants. If She had what she wants, she would deal with it herself, like a lot of other things, if given a half-assed chance.
Spray Liquid Seaweed on Her every 7 to 10 days, that will kill the Mites & your Baby will love you for it.... But the reason for the stress needs to be dealt with. Because of the sickness that invited the Mites, you Babies are 1/2 of their potential, as it stands right now. This is not Personal, but for all of the RIU People. Good Luck.