Carrigman said:This may be of interest.
Ever since I was 14 I have been doing something while in the bath that has
caused me great pleasure and that is ....reading. However, as a spectacle
wearer problems arose. Whenever I arranged for an infusion of hot water to
maintain a comfortable temperature my glasses steamed up. And then one day I
came across wise advice: smear some shampoo on the glasses, wipe them clean,
and, presto!: problem solved. No more misting. Now I can while away the time
happily reading in the bath without the annoyance of misty lenses.
Hmmm....the reason that the lenses mist up is that they are cold and
vapour condenses out of the warm moist air.
A similar problem in cars is overcome by heating the glass; windscreens
generally with blown hot air, rear screens with embedded wires.
So all you need to do is warm the lenses.
As you are surrounded by a warm medium (water) try dipping the lenses into
the water then removing them and refitting to your face. This cures the
problem of misting lenses. Sadly, I even checked this theory last night
before posting :-)
However this may not be a viable strategy on the hills, unless you are a
traditionalist who is always followed by native bearers carrying all you
require, including a tin bath.
Happy New Year
Dave R
P.S.
(1) they used to sell an 'anti-mist' liquid for car windscreens which
I suspected was a mild detergent solution. It did work, though.
(2) an old trick to prevent windscreens from misting up in the rain (on
the outside), if your windscreen wipers failed, was to rub the glass with
the cut face of a raw potato. Perhaps this is something you could try?
