On 24 Aug 2005 10:18:51 GMT, (Andrew
Gabriel) wrote:

I don't know what's used in plastic kettle descallers (I've used the
same stuff without any problems, but it usually says not to).

It'll kill them eventually.

"Kemetal" is a plastic used for kettle making. It's filled with a cheap
mineral filler, which is dissolved (slowly) by descalers. Eventually
you'll get softening and crumbling of the plastic,leading to leaks.

So use the descaler, but don't over-soak and rinse well afterwards.