Scrubbing Bubbles Automatic Shower Cleaner Nozzle Clogged

I have the Scrubbing Bubbles Automatic Cleaner for the shower. I purchased it about two years ago, but haven't used it for the last year because it wasn't working. I finally had time to take a look at it. After playing around with it quite a bit, I was finally able to get the motor running and the nozzle spinning each time I press the button.

However, the cleaning liquid doesn't dispense. I soaked the nozzle and the inside area in vinegar, but to no avail. I really enjoyed using this device, but am needing advice on how to engage the spraying part of the unit. Thanks in advance for any advice.

By Marla from MO