When does the machine replace the pad? Alan Cook February 14, 2017 01:24 Follow BrilliantPad replaces soiled pads automatically 1, 2 or 3 times a day - or anytime you like at the touch of a button. Related articles How often do I have to empty the waste? How much does replacement roll cost? How do I maintain the machine? Hold up. Doesn't that smell? What are the main benefits? Comments 0 comments Article is closed for comments.