Please choose the correct ending to complete the given sentence: Health: [header] How to take care of your glasses [title] Run your glasses under warm water. [step] Run the tap so that the water is lukewarm. Hold your frames beneath the water.

Ending1: Turn them over so that you check that the water is not draining out of the base. Place the rims of your glasses on a drying rack or flat surface. Ending2: Use the moment the water is almost over-boiling to rinse them off. [substeps] Ensure that your glasses are completely dry before proceeding. Ending3: Avoid using hot water as this can damage your glasses. This removes dust and other particles that can scratch the lens if rubbed into it. Ending4: Directly above the lens, place them into the warm (not hot) water. While covering the glasses, wring out the water and place them in the sink.

Answer format: ending1/ending2/ending3/ending4