Product description How to properly use the mucosal relief device? Four steps to clean the lungs and remove mucous membranes: Step 1: Contents. Relax your whole body, hold the device in one hand and place it in your mouth and keep your tip at ground level. Please note that the opening on the cover of the device must be kept transparent and not covered with any other object. Step 2:Content. Inhale slowly through your nose and hold your breath for 1 to 2 seconds. Step 3:Expire. Exhale slowly and as long as possible screaming to clean the mouth from the mucus spill. Do not inflate your cheeks when you exhale, keep your cheek muscles. This is essential for the correct use of the device and can be done with the other hand on the cheeks when exhaling to ensure that the muscles are tight.(Tips: Exhale slowly. Tighten your cheeks, your chest should vibrate), lift or lower the device, adjust the optimal position. Step 4:Repeat. Repeat steps 2 and 3: inhale and exhale, and hold the breath for an appropriate period of time, during which rapid and vigorous breathing should be avoided.