What should you do if a glass thermometer has been placed in a disinfectant solution?

If a glass thermometer has been placed in a disinfectant solution, it is crucial to rinse it with cold water. This action effectively removes any lingering disinfectant residue from the thermometer, ensuring that it is safe for use. Disinfectants can be harmful if ingested or if they contact the skin, so rinsing the thermometer thoroughly is a vital step in maintaining safety and hygiene standards.

It is important to note that rinsing with boiling water could potentially damage the thermometer as it may not be designed to withstand high temperatures. Wiping it with a clean, dry towel doesn't adequately remove harmful chemicals that could remain on the surface. Rinsing it with alcohol isn't appropriate because alcohol may not fully eliminate the disinfectant, and using alcohol can introduce another substance that could interfere with accurate readings. Therefore, rinsing with cold water is the most effective and safe choice.