Toyota corolla 1996 Manual page 70

Make sure you turn the defogger off when
the window is clear. Leaving the defogger
on for a long time could cause the battery
to discharge, especially during stop-and-
go driving. The defogger is not designed
for drying rain water or for melting snow.
NOTICE
z Without timer: To prevent the bat-
tery from being discharged, turn
the switch on when the engine is
running.
z When cleaning the inside of the
rear window, be careful not to
scratch or damage the heater
wires.
65