Also, if you ocasionally turn the microlined bag (and the outer cloth bag if you want) 180 degrees, after it starts to fill up, you will get improved suction.
Be sure to WASH the outter filter bag ocasionally also.
Swish it around in some hot sudzy water several times, rinse and wring out as best as possible, and let drip dry outside in the warm sun, if possible. Hang in out to dry on a clothesline would be perfect.
Also wash out the motor dome filter the same way, just let dry on a towel.
The TriStar/Compact after filters are a must, if you are into filtering as much as possible.
Having all new, fresh filters on a TriStar/Compact is like a walk in the park on breezy fresh warm spring day!,,just nothing else quite like it!