If you notice that the person giving chest compressions is not allowing for complete chest recoil, it is crucial to address this immediately to ensure high-quality CPR. Here are the steps you should take:

1. Communicate Immediately:
   • Calmly and clearly inform the rescuer about the need to allow complete chest recoil. For example, you can say, “Make sure you let the chest rise fully between compressions.”
2. Demonstrate the Correct Technique:
   • Show the proper technique for chest compressions, emphasizing the importance of allowing the chest to fully return to its normal position after each compression.
3. Assist if Necessary:
   • Offer to take over compressions if the rescuer is fatigued or struggling to maintain the correct technique. This can ensure that high-quality compressions are consistently delivered.
4. Monitor and Provide Feedback:
   • Continue to monitor the quality of chest compressions and provide ongoing feedback as needed. Positive reinforcement and constructive criticism can help maintain high standards.
5. Rotate Rescuers Regularly:
   • Rotate rescuers performing chest compressions every 2 minutes if possible, to prevent fatigue and maintain effective compressions.