A thermometer requires careful attention after use to ensure it remains hygienic and accurate. Post-use care involves cleaning, sanitization, and a specific drying procedure. Proper drying prevents damage and eliminates the potential for transferring microorganisms. Different types of thermometers, particularly contact and non-contact models, require distinct methods to ensure they are completely moisture-free.
Why Proper Drying is Essential
Residual moisture remaining on the device, even after sanitization, can compromise the thermometer’s cleanliness. The presence of water promotes the growth of microorganisms, effectively undoing the benefits of cleaning. This microbial persistence increases the risk of cross-contamination when the device is used or stored.
Drying is also necessary for maintaining the operational integrity and longevity of the thermometer. For digital models, moisture ingress into the casing can damage sensitive electronic components. If the internal circuitry is affected by water, the thermometer may produce inaccurate readings or experience total device failure.
Drying Contact Thermometers (Digital and Glass)
Thermometers that physically touch the body, such as digital probe or traditional glass models, require a two-step drying approach. After washing and sanitizing the probe or stem, the first action is to gently remove bulk moisture from the surface. This is best accomplished by using a soft, clean, lint-free material, such as a medical wipe or sterile gauze, to pat the device dry.
Wiping should be done with a light touch to avoid leaving any fibers or residue behind on the contact surface. After gentle wiping, the thermometer should be placed on a clean surface to air-dry completely. Air-drying ensures that any moisture trapped in small crevices, such as the seam around the probe tip, evaporates fully.
Special Care for Infrared Thermometers
Infrared thermometers, which include non-contact forehead and ear canal types, require a distinct drying protocol due to their sensitive optical components. These devices must never be submerged in any liquid, as the internal sensors are easily damaged by moisture. The drying process for the main casing is often simply allowing the residual disinfectant, if a wipe was used, to evaporate naturally.
Particular attention must be given to the optical lens or sensor, which must remain spotless for accurate measurement. If the lens requires drying after gentle cleaning with a cotton swab dampened with an approved agent like isopropyl alcohol, it must be allowed to air-dry fully. This evaporation ensures no streaks or film remain on the lens surface, which could interfere with accurate infrared detection. Allowing the lens to dry for an adequate period, often around 30 minutes, is recommended before use or storage.
Storing Thermometers Safely
Once a thermometer is confirmed to be completely dry, the final step is to place it into an appropriate storage location. The device should ideally be returned to its original protective case or sheath. Storing it in the case guards against physical damage, contamination from dust, and prevents accidental shocks that could compromise calibration and accuracy.
The chosen storage location should be cool, dry, and stable, away from areas of high humidity such as bathrooms or kitchens. Exposure to extreme temperatures, including direct sunlight or close proximity to heat sources, can warp the plastic casing or affect the sensitive components.