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Old 20th November 2021, 08:39 AM
John King John King is offline
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Join Date: Nov 2012
Location: County Durham
Posts: 3,319
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Not a good idea! Soap contains microscopic undissolveable solids which can leave a scum on the film.

Ask anyone who has to clean a bathroom basin. I noticed this when I started to use shower gel instead of soap, the shower didn't need cleaning nearly so often. I still use soap in the hand basin and that needs cleaning more or less daily.

Even washing up liquid is not good. That contains a high concentration of salt.

A bottle of wetting agent although it has a 'use by date' can largely be ignored and will last for a very long time.
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