diff --git a/README.md b/README.md
index 0a37446..40f91e7 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,14 @@ Note: Installation via the Arduino Library Manager is coming soon.
    Plotter` via the `Tools` menu to observe the measurement values. Note that
    the `Baud Rate` in the corresponding window has to be set to `115200 baud`.
 
+# Conditioning
+
+After each restart of the sensor or when the hotplates have been switched off, the conditioning command must
+be called from idle mode. The conditioning heats the hotplate of the NOx pixel to a different temperature compared
+to the measurement mode enabling a faster switch-on thereafter.
+
+It is recommended to execute the conditioning for 10s, but **10s must not be exceeded** to avoid damage to the sensing material.
+
 # Contributing
 
 **Contributions are welcome!**
diff --git a/examples/exampleUsage/exampleUsage.ino b/examples/exampleUsage/exampleUsage.ino
index f49a8ca..f3a8cc2 100644
--- a/examples/exampleUsage/exampleUsage.ino
+++ b/examples/exampleUsage/exampleUsage.ino
@@ -40,7 +40,9 @@
 
 SensirionI2CSgp41 sgp41;
 
-// time in seconds needed for NOx conditioning
+// Time in seconds needed for NOx conditioning
+// WARNING: To avoid damage to the sensing material the conditioning must not
+// exceed 10s!
 uint16_t conditioning_s = 10;
 
 void setup() {
diff --git a/src/SensirionI2CSgp41.h b/src/SensirionI2CSgp41.h
index 5915ef4..a94ec95 100644
--- a/src/SensirionI2CSgp41.h
+++ b/src/SensirionI2CSgp41.h
@@ -62,6 +62,9 @@ class SensirionI2CSgp41 {
      * different temperature for conditioning. This command returns only the
      * measured raw signal of the VOC pixel SRAW_VOC as 2 bytes (+ 1 CRC byte).
      *
+     * WARNING: To avoid damage to the sensing material the conditioning must
+     * not exceed 10s!
+     *
      * @param defaultRh Default conditions for relative humidty.
      *
      * @param defaultT Default conditions for temperature.