I don’t have any words of wisdom, but I can so relate to your post!! For each sensor that I waste (for either not putting it in right or just getting wacko readings), I say "Well, that is $35 in the trash!"
I didn’t know the transmitter could die after some time. Mine is actually sitting in the closet because I’m saving the few sensors that I have left…maybe not such a good idea now.
My BG sucks today, too. I’ll join you in the sulking corner!!