IE Suction When the suction cups dirt, use a damp cloth to gently plainclothes and dry effortful. When your wireless power bank works Improperly 1 Make sure theirs no any clutters on the wireless power bank. 2.When the wireless power bank Is over-heating, take your mobile device away from your wireless power bank, and the power bank will stop charging automatically when over-heating. Please try charging again when the wireless power bank cooling down.