al wrote:

It's gone on longer than IMM/Drivel's idiotic rants about insulation at this stage ...!

Time to inject some Caustic into it, is it?

Would a saturated solution of rockwool in caustic soda improve my
cordless drill's performance if I were to replace the electrolyte in
the batteries wth it?

Would it stop it evolving? Should I be careful to use dilute? What sort
of paint could I use to disguise the changes? And how much should I
charge it for?