It worked because you probably used the combo, ladies and gentleman, one of the main plants spider mites go after in the outdoors? is
peppers. Ok, sure, they probably won't fuck with habanero peppers, but think about that for a second. This does kill on contact because it's the second strongest pepper in the world, along with ghost chilli. You have to make the extract strong enough to where you need very good protective gear or man it up if you wanna cover a big amount if circumference, turn of all fans, drench everywhere everything, it's a mission if you grow big, easy if your grow is small. If it's not bothering you much, it's not strong enough and won't kill them.
I repeat, I have recently learned one of the main targets for spider mites outdoors in
peppers. It works but you have to mix it up with other things like the dude above did.
I recommend you guys read this thread,
https://www.icmag.com/ic/showthread.php?t=192286&page=2
Mostly for this piece but other goodies in there as well.
"simply take some lavender sprigs( sticks with flower buds on them) and strip the flower buds off. take a 1 liter bottle, add a 1/4 cup or so of lavender flower buds. let soak for 48 hours, then strain the plant material out well. dilute 1:50 and spray your plants lightly on infected areas, make sure to get under the leaves. repeat in 5 days. so far everyone i have told it to and has tried it has had success in killing mites, coot said even the eggs die which is pretty cool."