Hi, it's Allie from Crucial Vacuum.
Loss of suction into the dust cup may be caused by either the dust cup filters or the motorized brush.
After unplugging your unit, press the release button on the back of of the unit and remove the roller brush. To make sure there is no blockage in the air hose, flip back your unit and remove any debris clogged inside the hose. With a pair of scissors, carefully cut any hair strands or debris tangled in the roller brush. Make sure you do not cut or damage the bristles. Make sure there is no clog inside the air duct at the bottom of the unit. Re-install the brushroll by clicking it into place. If the problem still persists, you may need to check your unit's filters.
Check you filters by first removing the dust cup and then removing the foam filter and rise under lukewarm water until the water runs clean. Do not use soap. Squeeze the excess water off the filter and allow it to air dry for 24 hours before use. Washable filters are recommended to be washed after every 2 to 4 uses and replaced every 3 to 6 months.
You can purchase direct your replacement filter from Crucial Vacuum with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10
I hope this was helpful. If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendly customer care representatives on the line ready to assist you.
Alejandra (Allie) Sepulveda-Rivera
Crucial Vacuum Customer Care