Use two fingers to put in your PIN
One actually presses, the other one doesn’t
You could generate an absurd amount of possible PINs that could work on your card, giving any PIN peepers a seriously hard time, should they somehow have the intent to get ahold of your card and PIN through spying and pickpocketing
That’s why I spend a few minutes afterward licking the keypad to lay false heat signatures and promote faster cooling due to saliva. Attackers/observers are temporarily stunned with confusion and disgust, giving me a brief window to escape unnoticed.
Making sure that machine is warmed up for whatever deposit or withdrawal you had in mind?
Also dissolves some of the oils your hand left behind, which any 2 bit criminal with a forensics lab would pick up on in a second