Braun disposable lens filters enable accurate and hygienic temperature taking. It's essential to replace the Braun ThermoScan lens filter on the temperature sensor each time a reading is taken. Disposable lens filters ensure hygienic use without having to clean or disinfect the sensor, virtually eliminating cross-contamination. Fitting a new Braun lens filter each time also prevents dirt or earwax from building up and clogging the sensor window, which could lead to inaccurate temperature readings.