Sony Trinitrons degauss at power on - think of how loud the "frying pan" noise is on your 29 inch telly when you turn it on dude   My little 25 inch Sony does the same as well...

I might try using my Antistat gun on a CD one day - if I can be bothered.   I think it's defo snake oil though - although most people said that about cleaning vinyl not so long ago