Thank you everyone! This happened to me twice. The first time I was across the street from an automotive repair shop. The mechanic came over from across the street an gave it a try. NO LUCK! I had to call a wrecker to get the car across the street to where they could repair it. About $450 for replacement and re-key! While waiting for the wrecker I gave the key one more try and fortunately the tumblers loosened and freed up the switch. I was able to cancel the wrecker in time and did not have to replace the switch. It gave me no problem for about a year and today it happened again when I was I was ready to leave my garage. I fiddled with the switch for about an hour then I thought of checking out the problem on the internet. This forum popped up. In my Lexus owners packet was a flat key used as a tempplate for key replacement and emergency starting of the car. I did about three squirts of WD40 in the key way of the switch, tapped the key template about three little taps and presto, that freed the tumblers. I added a little more WD40 and worked the regular key to make sure the it worked smoothly.