Records are made from non-magnetic materials. They can't be magnetised so there's no need to waste time and money trying to "demagnetise" them. And please don't dish up the nonsense about transition metal ions in the printing ink on the label. These are present in such low concentrations as to have a negligible effect.
Now I'll await the hordes of buyers of demagnetisers who spent several hundred dollars and definitely heard an improvement.
Now I'll await the hordes of buyers of demagnetisers who spent several hundred dollars and definitely heard an improvement.