I use a small piece of a Scotch-brite pad:

<http://www.scotch-brite.com/wps/portal/3M/en_US/Scotch-BriteBrand/Scotch-Brite/Products/Product-Catalog/~/Non-Scratch-Scour-Pad?N=5941615&rt=rud>

DS

On 14 November 2012 01:09, Igor Roshchin <[email protected]> wrote:
>
>
> In the recent past, my flash (Metz AF58-1) in combination with K-7
> developed a problem. In some cases, I do not get the flash-ready
> confirmation symbol in the viewfinder. In other cases, even if I do
> get that confirmation at first, the flash (in PTTL mode) goes off full
> capacity, as if the PTTL did not work, yielding extremely overlit
> images. In those cases, often, on the subsequent shots, there is
> no flash confirmation symbol.
>
> All those problems can be fixed by tweaking the hotshoe in the socket
> (sliding it slightly in or out), but it takes a few times to find the
> "right" position.
> I am thinking if this can be fixed by cleaning the contacts.
>
> What are the options of cleaning the contacts besides the obvious of
> using a q-tip soaked in isopropanol?
>
> Any other thoughts on what else might be causing such hot-shoe issues?
>
> Igor

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