This scrubber on the machine is odd enough to get working. First you have to make sure both 'power' buttons are on (the main on the right side of the machine and the secondary on the top left. In order to get the scrubber running, you need to use the lower right buttons to get the scrubber functioning. Choose either the bowtie or the camel back for the scrubber and then select intensity, then set the timer, as soon as the timer comes on the scrubber will start vibrating. Other than that, I am not sure why it wouldn't be working.