ASOG Smart Sonic Plaque Remover For Teeth COMMON FAQ! Question 1: The machine doesn’t vibrate after power on, Is it defective ? Answer : The machine is good. ASOG tooth cleaner adopt real sonic technology instead of motor vibration. The handle doesn’t vibrate and no sound after powered on It is activated only the head touches the hard object such like teeth(try it on egg or ceramic bowls for testing), and stop working while touching on soft gum, which will protect your gum 100% safe Question 2: The device shuts down during use, is it broken? Answer : Overheating self protect would starting every 10 minutes, the device shut down automatically, in order to protect the safety and service life of the device. Turn it on to restart working continuously if needed Question 3: Will it hurt my gum, pain or not? Answer: Our plaque remover has the intelligent recognition future, it will stop working while touching the soft surface/ gum. 100% safe and no pain The plaque remover for teeth cleans tartar through frequency vibration and stimulates the gums. Bleeding gums are normal and harmless to gums Question 4: Why does the indicator light not light up after switch on? A: Please charge the machine firstly after received it. It will take 3-5 hours. Press and hold the key 3-4 seconds to power on; switch off in the same way Question 5: The strength is not enough strong even use high mode. Answer: The tartar remover for teeth is high-intensity vibration frequency of 2 million times per minute, which can meet different needs for different sensitivity of teeth. Please check the following and and verify: · Please check if the cleaner head loose or not, tighten it firmly with small wrench · Please check if the battery ran out and charge the machine till the battery is full