On Fri, 6 Jan 2012 13:54:57 -0000, David WE Roberts wrote:

Except then you can't get away from it to lather up or if it
suddenly
gets hot/cold. I find most shower on/off controls difficult to use
with hands covered in lather.

Thermostatic shower control?
Although that wouldn't sort the cold watrer only problem.

Thermostatic have a lag though some are quite quick but the main
problem with not being able to get out of the shower water is that
you can't lather up well without the soap/detergent getting washed
away. Most controls are too fiddly to use with wet soapy hands.

--
Cheers
Dave.