Remove one block from card and drop into cistern away from water inlet. Leave for a few minutes for the block to activate before the first flush. These blocks are wrapped in a water-soluble film which must not be removed. When foaming and colour fades, replace with another block. WARNING Causes skin Irritation. Causes serious eye irritation. Harmful if swallowed. IF ON SKIN: Wash with plenty of soap and water. If skin irritation occurs seek medical attention. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do so. Continue rinsing. If eye irritation persists seek medical attention. IF SWALLOWED: If you feel unwell seek medical attention or call a poison centre. Dispose of waste contents in accordance with local authority regulations.