I'd follow the recommendations of the spray, and raise lights till dry. Then just before lights out, rinse the stuff off with ph'd water. Repeat if and when it says to.

Keep the pot litter-free, allow soil to dry between waterings, and I'd keep the no pest strip till harvest.

The damaged leaves won't repair themselves, but should still photosynthesize. If you've knocked the mites down, the new growth should be fine.