Arrived today. Worked fine for 10 minutes. I turned off the rollers and the bubbles but left the temp on, and put on the lid, planning to come back after I let my dog out-so like less than 10 minutes. Water in the tank was filled with black specks when I came back. Figured it was residue or something so I drained it, washed it thoroughly, and refilled. The rollers do not work and the troubleshooting in the owner's manual is laughable. Will definitely return and purchase a more familiar brand. DiSee full review