They won't touch a doorknob without sanitising it, let alone shake hands.

未杀菌的门把不碰，更别提握手啰。

Decliners are fastidious folk, they won't touch a door knob without sanitising it, let alone shake hands.

后退式的人比较挑剔，如果门把手不消毒都不会碰，更不要说握手。