They have mosquito dunks which are high in bacillus thuringensis. They will help with the mites. You can use pyrithium. I would spray them down in the shower to wash the webs off. Mix neem in with the soap and spray the soil as this is where they mate. The pyrithium can burn so dilute it. They breed faster in over 80 degree heat with heigh humidity. if you got a dehumidifier that would help.