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RX300 2003
Car was washed and left out in the 15 degree cold weather
Tried to put down drivers window
It stuck for a second then went down half way
Now will only go down that far
Try running it up (you don't say, but I'm assuming it will go up) and HOLD the switch for about 4 seconds to see if it will reset itself. That is the normal procedure for a "reset". It might work.