I find this comment extremely unhelpful. Where would she be likely to find silver or silver chloride in her house right now in a convenient way to be able to make the electrode? The only silver I have in my house is a spoon my grandmother gave me (I don't get old people's fascination with spoons), so personally I wouldn't be inclined to monkey around with it, if I could get good enough results out of something else. And I assume she wants to use something lying around in the house because if she were to have to order something she might as well just order real electrodes.

Your comment comes off as "this other way that you are not doing is the best way, so you way may as well not even try". This is Hacker News, after all. A hack is, by definition, slapped together from what's available on hand.