We need to screen our organ donors more closely.
A play on the term "organ donors" --- an organ donor usually refers to someone who opts in to having their organs donated after their death; these folks might be screened for health conditions to make sure transplantation is safe. But here, the organ donor is someone who gave the musical instrument organ to the church; a more close screening process for someone donating a musical instrument would have presumably caught the fact that the organ isn't an instrument, it's a radiator.