I fought a mite problem, in my large room, for over 2 years. They disappear until my 2nd or 3rd week of flowering, then I notice 1 or 2 plants in the back of the room have some minor damage, and then it slowly spreads to the weaker plants in the room. Here are my suggestions:
I keep a 5 gallon container of Mighty Wash (NPK INdustries- look them up), which is water infused with a frequency charge which can be used up to day of harvest. It's expensive but it does work. Apply with the lights off, and then after an hour or two, I wash the plants off removing the Mighty Wash and dead mites. Do this every 3 days, 3X but it can be done daily if you wish. I also do the outside of the pots, walls, floors, etc. After the crop ends, I use straight chlorox and wash the room down, including the empty pots to make sure the bleach hits EVERYTHING. Wipe the lights, fans, fertilizer containers, etc. with chlorox wipes too. The mites can go dormant for months and can live in cracks in the floor or walls, etc.
Lowering the temps helps slow them down, as does running fans at high blowing on the plants. The mites always rise to the tops of the plants, where it is warmer, which they like. Pay particular attention to your plants daily, to nip infections early. Leaves that are heavily infested are removed from the plants, lowering yield, but it reduces the population quickly.
I have used Forbid, Floramite and Avid in veg.........I don't recommend them in flowering. These are expensive, but you can buy small amounts on Ebay for around $20. The key to all of these is making sure your spray has 100% coverage. If you miss even just a few mites.......in a week or so they will be back with a vengeance. The hot pepper mixes Ed mentioned impart a spicey (hot) taste to your buds- I would not use them ever again. I have used a cold-water spray, shooting them under the leaves and this can knock them off the leaves too but it's only a temporary measure.
Lastly, be proactive.....do not wait until the mites show themselves. If they do, it could be too late. I should also mention LIquid Ladybug, which uses natural oils that suffocate the mites and evaporate off the plants after an hour or so. It's mildly effective, but does work too. And can also be used up to harvest. BUT, it's always best to try to take care of any issues before flowering or the plants health, and therefore yield and quality will suffer.