Election Commission chairman Tan Sri Abdul Aziz Yusof says he is unsure why the indelible ink can be washed easily off some voters' fingers.
"We have to check the process of applying the ink.
"In my case, I tried to wash with soap but it really stuck on my finger.
"I got my finger inked at 9am and it is still there," he said.
Aziz was commenting on claims on the social media that the ink, which
should last at least four days, could be washed easily.