I don't get spider mites but for the last 2 years I've had tomato russet mites.
I did something similar to you except I used a hose end sprayer and blasted them with water/ kelp in the evenings. At one point I did it 4 days in a row. I used powered kelp so it was really inexpensive.
I also bought a Fogg It Nozzle
https://www.amazon.com/Fogg-It-Nozzl...=mister+nozzle
that I used sometimes during the day with plain water but would more often just adjusted the regular hose nozzle to a flat, etc spray pattern. I had intended on attaching the Fogg It to the hose end sprayer but that didn't work as planned.
I live in a hot / humid area but get a lot of wind and found no ill effects from having wet leaves. It must be the wind or being close to the ocean.