HI, it's Jim from Crucial Vacuum!
When it comes to your vacuum having poor suction there are a few general maintenance procedures you can easily do to help your Dyson's overall performance.
After every use, make sure to empty your unit's dust cup. Allowing for fine dust and debris to rest in your unit's dust cup for a long period may cause your unit to become clogged.
It is recommended to wash and clean your unit's filter screen weekly. To do so, empty your filter screen outdoors to take off any excess debris and then clean under running water until the water comes out clean. Allow the filter screen to fully dry before inserting it back into the unit. This may take up to several hours. Be sure to allow it to FULLY dry.
Foam and cloth filters should also be washed and dried weekly, by following the same steps from cleaning the filter screen. Do not use any soap, dishwasher, dryer or washing machine to do so. Allow your filters to air dry for 24 hours before re-installing them in your Dyson.
Replace your belts every 6 months. Last, make sure to clear your brush roll of any hair strands or debris monthly and to replace at least every year. When examining your brush roll take note of the condition of the bristles. Are they loose? If so this would be a good time to change your brush roll. While checking the brush roll you might as well examine your Dyson's belt. With use the belt will stretch out, lessening the tension on the brush roller. Lesser tension diminishes the brush roller's turn rate and speed. So if your belt feels loose as well replace that.
All of the previous general maintenance tips will help improve your vacuums suction and overall performance.
You can purchase your replacement parts for your Dyson direct 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.
Crucial Vacuum Customer Care