Indoor citrus plants commonly attract mealy bugs, spider mites and scales. Spider mites are tiny spiders that can be visible under a hand lens. Also, spider mites are typically drawn to indoor citrus plants that are dry and cool. Once you get rid of your mite problem on your citrus plant, protect it from returning mites and other insects.
Increase the humidity in your room to discourage the mites from entering your citrus plant. Mites will only invade your plant if the area is particularly cool and below 60 degrees. Keep your room temperature at no less than 75 degrees.
Spray your leaves with warm water using a spray bottle. The warm water won't hurt your fruit but it will increase the temperature, to help keep mites away from your plant.
Wipe your leaves with soap and warm water using a soft cloth. It's important to clean your plant with soap and water at least once every week so that there are no decaying leaves that can attract mites.
Clip off any diseased leaves or parts of the plant using scissors. Leaving any decayed fruit or leaves around the plant could attract the mite and many other insects. It's best to dispose of any material immediately.
Purchase a spider mite deterrent that is specific for household plants. Make sure that the product is also safe for citrus plants, and that it contains malathion. Spray as directed on the bottle, and continue to clean your leaves each week.