Introduction
The normal method of cleaning was not effective. In this case the Dustbuster itself needed to be removed and cleaned.
Tools
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            Open the lid by pressing the grey button and lifting it away. 
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            Clean each of the plastic parts with soap and water, and then leave them out to dry. 
 
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            Follow these steps to open the electronic casing. 
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            Remove the four screws as shown in picture two. 
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            Remove the fifth screw at the bottom as shown in picture three. 
 
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            Gently pry the device open, using an iSesamo opener. 
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            Now the I/O button can be removed. 
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            Completely replacing this entire part requires desoldering wire connections. 
 
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            Now the electronic components can be cleaned using an air compressor. 
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            In picture one, you can see the PCBs. Under the PCB, you'll see blue batteries. These are 2 x 3 AA rechargeable batteries . 
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            If the dust bag needs to be replaced, remove its securing screws. 
 
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To reassemble your device, follow these instructions in reverse order.