In article ,
Sammy wrote:
I like to keep my old bank cards intact and use them for jobs around
the house. My worry is that the data on the magnetic strip can still
be read.

What is the best way to destroy that data without messing up the card
for D-I-Y work.

Destroying the magnetic strip won't gain you anything if the embossed
account number is still readable.
--
"We've all heard that a million monkeys banging on a million typewriters
will eventually reproduce the entire works of Shakespeare. Now, thanks to
the Internet, we know this is not true." -- Robert Wilensky