Important: Use drinking water quality for any of the following described cleaning procedures. Clean parts immediately after use to avoid dry up of milk residues and to prevent from growth of bacteria. Prior to first use and once daily: Disassemble, wash and rinse all parts. Place parts in a saucepan of sufficient capacity. Fill with cold water until the parts are well covered. Optionally, a tea spoon of citric acid may be added to avoid a build-up of limescale. Heat it up and allow to boil for 5 minutes. Alternatively, the disassembled parts can be sanitized in Medela Quick Clean Microwave Bags or in top rack of dishwasher or steam-sterilized. After each use: Disassemble and wash all parts in warm, soapy water. Rinse in clear water and allow parts to air-dry on a clean towel. Warning Keep all components not in use out of the reach of children. Caution Avoid touching the inside of bottles and lids after cleaning.