Once at Asda and then Aldi.

If you tap reader with your card in its case it could well be read.

I think the info bleeds out the opening of your case as your card is not fully encased.

Card could not be read if held say 150mm away from reader.

At the end of the day it’s in the luck of the gods, as least I’ve tried to minimise any monetary loss.

There is one thing though, credit cards well watched by bank but if debit card no idea but it may be wise to check your limit.

It used to be £250 then it went up but you have to enter a PIN number.

It’s up to you to safeguard your cards as best you can.