Secruity check at Changi Airport

I dislike the security check at Changi Airport. Although I remove my keys, pens, wallets, coins and other metallic devices, the metal detector will always beep. I decided that there is no point in removing these items.

At other airports, the metal detector is set at a more sensible level. It does not beep for the normal things that a passenger will carry.

I hope that our metal detectors at Changi Airport can be set at a more sensible level. I am surprised that this situation has been continued for more than three years, after it was introduced. Surely there must be some feedback from passengers?