spider mites?

Outdoor grow. Hot and dry where I am, so of course they are here. On 3 out of my twelve plants, which are over 3 weeks old. I have been spraying down my plants with been oil for almost 2 weeks.
I know humidity keeps them away so here's my question:
I keep my plants in a C02 room at night in the dark to help their growth, so how could I make that room humid?
And how else can I get rid of / prevent this better?

MJ plants dont use/need co2 in the dark.... only in the light...flowering in a very humid area promotes bud rot

if you are bringing them inside into a room, hang a no pest strip and the mites will be all gone in a few days.

colonuggs said:

MJ plants dont use/need co2 in the dark.... only in the light...flowering in a very humid area promotes bud rot

Click to expand...

I'm still in vegging like I said they are 3 weeks old. Not gonna be doing this during