Q: I went to use my hairdryer in the bathroom, but I discovered some of the outlets have stopped working. My GFCI test button won’t push in when I try to reset it, but nothing has tripped in the ...

GFCIs save lives. Learn how to test your GFCIs two ways, with these instructions.

Once again we’re trying to dispel a modern mystery that lurks in plain sight. For previous columns, click here; to submit your own suggestions, see the e-mail address below. Who indeed? Next time ...