It appears that the protective film on the lenses of the card readers might have been hampering the reading of biometrics.
PREMIUM TIMES has got at least two reports of the protective film of the lenses not being removed. Once removed, the card readers performed optimally.
One citizen monitor sent this to PREMIUM TIMES: “Card readers were apparently failing often at a polling booth. And the guy couldn’t understand … the readers were all new. So he approached the INEC woman. (She) inspected the reader only to find the protective film on the lens of the reader had not been removed. After a protracted argument, he convinced the woman to remove it. The reader not only read the prior rejected cards, it was reading with even faster response time”.
Another citizen advised INEC staff to remove the film so it could function better.