I too have a Fluxbuster...but be careful. Contact your cartridge manufacturer to get their recommendation. ..especially on high end cartridges with very thin wire with few windings...the flux can actually melt the wire and ruin the cartridge. I contacted Ortofon who does not recommend the fluxbuster for that very reason. Cardas has a test record that degauses the cartridge without the blast of electricity (even that small amount).
Cartridge Demagnetization: Moving Magnet/Iron vs Moving Coil Processes
For years I have applied the old, very effective, demagnetization process for Moving Coils: put on a test signal record, detach phono cables, hold pin on one RCA to the can of the other for a minute and then reverse holding other pin to other can. Improvement is dramatic and immediate. Is there an equivalent process, (though not about degaussing the iron I suspect), for Moving Magnet/Iron cartridges with equal improvement results?