I had the same problem with my Dyson DC16 handheld. Forget about cleaning, this does not solve the issue
Here's the problem (see photos).
When you install the filter there's a tiny magnet that clings onto a hidden switch in a square plastic knob.
This hidden switch is not switched on after a while because the magnet is too weak.
Try it: Without the filter, the Dyson won't work UNLESS you apply a separate stronger magnet to the square knob.
The solution is to either insert a small magnet to the knob or opening the whole %#*@ thing (unscrew the housing) and permanently turn the switch on by inserting something behind it (a small pie
[image|2758984]
[image|2758977]
[image|2758978]