In uk.d-i-y, Owain wrote:
On 9 Aug, 22:50, Bob Minchin wrote:
Infra red detector ones are best. They only switch on when a hand

They have them in my local shopping centre loos. I seem to have
invisible hands though

I find the taps OK but the hand detectors used in hot-air dryers are
something else. It's apparently beyond the wit of man to design a
detector that actually works properly.

--
Mike Barnes