To eliminate, re-pots the plant, and if you find any unwanted guests, wash off as much soil and critters as possible, soak the roots in a systemic insecticide, and re-pots.
Spider mites hate being wet. Overhead watering and misting is often listed as a preventative and a cure for spider mite problems. Mites are not insects, so insecticides often have little effect on them. The use of a matricide, however, is recommended for widespread problems.
Place your plant in an area well lit with natural light, such as on
a windowsill or on a patio. Avoid intense, direct sunlight until plant
has acclimitized to its new environment.
Water when soil is dry to the touch, which is approximately every 7 - 10 days, indoors or once a week for outdoor. Water less frequently during winter months, as this is the natural dormancy period of many plants.