1) Clean the beaker and flask with warm water and some washing-up liquid.
2) Rinse the beaker and flask thoroughly with fresh water.
3) To clean the pouring lid (see figure below), turn the top part anticlockwise to remove it from the bottom part.
4) Clean both parts with warm water and some washing-up liquid and rinse them thoroughly with fresh water.
5) Let all parts of the thermal bottle warmer dry completely before assembling.