Here is a link of my battle with spider mites.
A quick cheap way to kill them on contact is using the Ning-Icide recipe.
2-3 habanero peppers
2-3 (or more) garlic cloves
1/2 tsp dish soap
Quart water
Sprayer
Mash up the garlic in a mortar and pestle
Add habanero and mash up
Strain mash through strainer into sprayer add water and soap.
Spray bottoms and tops of leaves
Top of soil and sides of pot
Kills them on contact
Repeat every 3-4 days
Many other products I’ve been using to
Hope this helps