Your Cross Wave is usually difficult to push if you’re vacuuming thick carpet or sticky, hard floors. But if you’re not cleaning floors with these two conditions, follow the below steps for inspection:  • Unplug the machine and lay the unit down to inspect the wheels • Spin the front and rear of these wheels • Remove any debris   • Plug it back in and select the cleaning mode  • Remove the access plate on the bottom of your machine and inspect the brush roll. • Inspect the brush roll by turning it manually  • Clean off debris on the brush roll (if any)  • If the brush roll doesn’t turn or the belt is broken, replace it.