If you haven't killed any orchids, then you just aren't trying... to grow them, not to kill them. Besides, Masd's in NH would require a cool case in the summer with high humidity in the winter. Certainly not windowsill conditions!
I don't know how many I killed, but mine have been suffering from an overcrowded schedule of writing and book promotion the last few years. Where I was up to about 200 plants at one point, including a ton of seedlings, I'm now under 100, and some are still touch-and-go.
It breaks my heart to see beloved plants croak, but I've got to keep telling myself the book comes first and I can always buy more 'chids when I'm finally making some money.
Feel better, AlpJulie?