1. Significantly inaccurate measurements: If the readings fluctuate wildly or differ significantly from other thermometers, the probe is likely dirty or damp and needs immediate cleaning.
2. Stains or dust on the surface: If the probe or body feels sticky or has visible dirt, it definitely needs to be cleaned, otherwise it will affect the measurement.
3. Dirty usage environment: If it has been used in dusty or greasy environments such as kitchens or construction sites, or if it has been used to measure food or liquids, it's best to clean it afterward to avoid residue affecting future measurements.
4. Regular cleaning reminders: Some thermometers will prompt you to clean them, or the instruction manual may recommend regular maintenance; follow these instructions.
5. Unusual odor or discoloration: If the probe smells strange or has changed color, it may indicate bacterial growth or material aging, requiring immediate cleaning or replacement.
6. Shared by multiple people or used to test patients: If several people use the same device, or if it has been used to test someone with a fever, it must be cleaned and disinfected after each use to avoid cross-infection.
