FAQ Search Select a Category Cleaning Formulas Cleaning Tips Corporate Deep Cleaners FAQ Hard Floor Cleaners Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go My PowerGlide® with Lift-Off® Technology is hard to push. What do I do? Answer: Auto Height Adjustment – no adjustment knob to turn. Make sure the brush is turning. If it is not, the machine will be hard to push. If necessary, check brush not rotating If you have a hose with "variable suction control" open the suction control. This should resolve the issue. This is described in the User Guide and will point out where on the hose it is located if you have this feature.