I found out two weeks ago that you can just hover your debit card above the card reader at lidl if it's got a wifi symbol on it, and BAM! your payment is made!
you don't even have to type in your pin code when it is less than 25€. it's more dangerous if you lose your card but it's so convenient otherwise, it's even faster than paying with cash.
I don't know if it's my baker-me, but I always try to work together with the cashier at checkout to make the process super smooth and be done quickly. hm. that is definitely my baker-me..