Dry Aid KitThe purpose of a dry aid kit is to remove moisture which may build up in the hearing aid. Moisture can occur from perspiration, condensation or humidity in the air. Dry aid kits are available from www.affordable-batteries.co.uk.Using a Dry Aid Kit Remove the batteries from the hearing aids and set them aside. The life of a zinc air battery is reduced by exposure to the active ingredients in a dry aid kit.Leave the battery doors open.Put the hearing aids (and ear molds if applicable) into the kit.Seal the kit.Leave the hearing aids in the kit overnight. More or less drying time may be necessary depending on the amount of moisture present.Keep the kit closed at all times to extend its usable life.