In article ,
Brian Gaff wrote:

CDs can't be nuked to reliably kill the data without getting them hot
enough to cause a fume problem. Shredding is easier, although you do
need a hefty shredder.

We bought a cross-cut shredder from Tescos (I think) for some silly
low price (like a tenner) and it has a CD slot. Only tried it once as
a curiosity and it worked well!

Gordon