Get some exercise outdoors every day, preferably near running water. When you go to sleep, turn electrical appliances off at the power point. If you are feeling sick, asthmatic or under the weather, be aware that your sensitivity to positive ions will be increased. Try to take a walk along the beach or sit in the garden. These natural elements all help to counter the effects of positive ions.
Excerpts from Body+Soul
Alternatively commercial ionisers like Nikao ionbands charged with negative ions property help counter the effects of Wi-Fi and positive ions in the atmosphere, raising the alkaline level in your body and neutralises acidic toxins.