FAQ Search Select a Category BarkBath Cleaning Formulas Cleaning Tips Commercial Products Corporate Deep Cleaners Hard Floor Cleaners Mops, Brooms and Brushes Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go The height adjustment knob on my Pet Hair Eraser® is hard to turn. Any suggestions? Answer: With the vacuum in a locked, upright position, tilt it back slightly so the unit is resting on the back wheels and the front is slightly raised off the floor. This will relieve the pressure against the base, making it much easier to turn the knob. Related Questions Why is my vacuum sounding loud? What should I check? Where can I get a replacement brush and brush belt for my BISSELL Go Vac? My Powergroom® Pet Canister Vacuum power cord does not rewind fully. What should I do? Why doesn't the power cord rewind fully on my Pet Hair Eraser® or Opticlean® Cyclonic Vacuum?