OP, why not use, no more tears or similar baby shampoo.
it doesn't sting.
don't do anything risky, with manoeuvres.
i am having some problems lately. i used to just put my head under the single bath tap, while i was having a bath, to wash hair. don't have a shower. but now i can hardly turn the cold tap, it is v stiff, and if i can open it, i struggle to close it.
can't get anyone in. don't ask.
wish i'd had them changed a few years ago, when i had the basin taps changed to neat levers.
the bath ones haven't got much grip. stupid design.