I have an old electric knife (220V 50Hz) which seems to produce a lot of EMI. Some clues on that were a "bzzzz" noise from PC speaker I noticed sometimes when someone use it.
Recently I bought a device which has touch-buttons and I noticed when the knife is in use the device detect false touch. So at this point I think that knife produce a lot of EMI (maybe due to it is an old model?)
So, I would ask: is there any way to reduce them (capacitor on AC motor,..)?
Or can I make a sort of shield? (eg. whith alluminium sheets glued inside the plastic cover).
Please don't suggest to replace it :) the question is just to know something more about EMI, shielding, etc..