Iain Churches wrote:



** A sewing needle usually does the job.

Just dig the point into the depressed centre of the dome, lean the needle
over and pull back. May need a couple of tries to get it all out.


Phil's remedy is a good one.

An alternative, is a small soft-plastic suction cup
(for example the kind used to attach a parking
permit to a car windscreen)



** I've seen dust dome made of porous cloth that cannot respond to suction, plus some aluminium or aluminised plastic domes have a deliberate hole in the centre.

The sewing needle trick works withs all of them.


.... Phil